INTERIM SUB-ADVISORY AGREEMENT

                        TOUCHSTONE SMALL CAP GROWTH FUND
                           TOUCHSTONE STRATEGIC TRUST

      This INTERIM SUB-ADVISORY AGREEMENT is made as of September 12, 2007, by
and between TOUCHSTONE ADVISORS, INC., an Ohio corporation (the "Advisor"), and
FORT WASHINGTON INVESTMENT ADVISORS, INC., an Ohio CORPORATION (the
"Sub-Advisor").

      WHEREAS, the Advisor is an investment advisor registered under the
Investment Advisers Act of 1940, as amended, and has been retained by Touchstone
Strategic Trust (the "Trust"), a Massachusetts business trust organized pursuant
to a Declaration of Trust dated May 19, 1993 and registered as an open-end
diversified management investment company under the Investment Company Act of
1940 (the "1940 Act"), to provide investment advisory services with respect to
certain assets of the Touchstone Small Cap Growth Fund (the "Fund"); and

      WHEREAS, the Sub-Advisor also is an investment advisor registered under
the Investment Advisers Act of 1940, as amended; and

      WHEREAS, the Advisor desires to retain the Sub-Advisor to furnish it with
portfolio management services in connection with the Advisor's investment
advisory activities on behalf of the Fund, and the Sub-Advisor is willing to
furnish such services to the Advisor and the Fund;

      NOW THEREFORE, in consideration of the terms and conditions hereinafter
set forth, it is agreed as follows:

      1. EMPLOYMENT OF THE SUB-ADVISOR. In accordance with and subject to the
Investment Advisory Agreement between the Trust and the Advisor, attached hereto
as Exhibit A (the "Advisory Agreement"), the Advisor hereby appoints the
Sub-Advisor to manage the investment and reinvestment of that portion of the
assets of the Fund allocated to it by the Advisor (the "Fund Assets"), in
conformity with the Fund's currently effective Registration Statement,
prospectus and Statement of Additional Information and subject to the control
and direction of the Advisor and the Trust's Board of Trustees, for the period
and on the terms hereinafter set forth. The Sub-Advisor hereby accepts such
employment and agrees during such period to render the services and to perform
the duties called for by this Agreement for the compensation herein provided.
The Sub-Advisor shall at all times maintain its registration as an investment
advisor under the Investment Advisers Act of 1940 and shall otherwise comply in
all material respects with all applicable laws and regulations, both state and
federal. The Sub-Advisor shall for all purposes herein be deemed an independent
contractor and shall, except as expressly provided or authorized (whether herein
or otherwise), have no authority to act for or represent the Trust in any way or
otherwise be deemed an agent of the Trust or the Fund.

      2. DUTIES OF THE SUB-ADVISOR. The Sub-Advisor will provide the following
services and undertake the following duties:


            a. The Sub-Advisor will manage the investment and reinvestment of
      the Fund Assets, subject to and in accordance with the investment
      objectives, policies and restrictions of the Fund and in conformity with
      the Fund's currently effective Registration Statement, prospectus and
      Statement of Additional Information and any directions which the Advisor
      or the Trust's Board of Trustees may give from time to time with respect
      to the Fund. In furtherance of the foregoing, the Sub-Advisor will make
      all determinations with respect to the investment of the Fund Assets and
      the purchase and sale of portfolio securities and shall take such steps as
      may be necessary or advisable to implement the same. The Sub-Advisor also
      will determine the manner in which voting rights, rights to consent to
      corporate action and any other rights pertaining to the portfolio
      securities will be exercised. The Sub-Advisor will render regular reports
      to the Trust's Board of Trustees and to the Advisor (or such other advisor
      or advisors as the Advisor shall engage to assist it in the evaluation of
      the performance and activities of the Sub-Advisor). Such reports shall be
      made in such form and manner and with respect to such matters regarding
      the Fund and the Sub-Advisor as the Trust or the Advisor shall from time
      to time request; provided, however, that in the absence of extraordinary
      circumstances, the individual primarily responsible for management of Fund
      Assets for the Sub-Advisor will not be required to attend in person more
      than one meeting per year with the trustees of the Trust.

            b. The Sub-Advisor shall provide support to the Advisor with respect
      to the marketing of the Fund, including but not limited to: (i) permission
      to use the Sub-Advisor's name as provided in Section 5, (ii) permission to
      use the past performance and investment history of the Sub-Advisor with
      respect to a composite of other funds managed by the Sub-Advisor that are
      comparable, in investment objective and composition, to the Fund, (iii)
      access to the individual(s) responsible for day-to-day management of the
      Fund for marketing conferences, teleconferences and other activities
      involving the promotion of the Fund, subject to the reasonable request of
      the Advisor, (iv) permission to use biographical and historical data of
      the Sub-Advisor and individual manager(s), and (v) permission to use the
      names of those clients pre-approved by the Sub-Advisor to which the
      Sub-Advisor provides investment management services, subject to receipt of
      the consent of such clients to the use of their names.

            c. The Sub-Advisor will, in the name of the Fund, place orders for
      the execution of all portfolio transactions in accordance with the
      policies with respect thereto set forth in the Trust's registration
      statements under the 1940 Act and the Securities Act of 1933, as such
      registration statements may be in effect from time to time. In connection
      with the placement of orders for the execution of portfolio transactions,
      the Sub-Advisor will create and maintain all necessary brokerage records
      of the Fund in accordance with all applicable laws, rules and regulations,
      including but not limited to records required by Section 31(a) of the 1940
      Act. All records shall be the property of the Trust and shall be available
      for inspection and use by the Securities and Exchange Commission (the
      "SEC"), the Trust or any person retained by the Trust. Where applicable,
      such records shall be maintained by the Advisor for the periods and in the
      places required by Rule 31a-2 under the 1940 Act. When placing orders with
      brokers and dealers, the Sub-Advisor's primary objective shall be to
      obtain the most favorable price and execution available for the Fund, and
      in placing such orders the Sub-Advisor may consider a number of factors,
      including, without limitation, the overall direct net economic result to
      the Fund (including commissions, which may not be the lowest available but
      ordinarily should not be higher than the generally prevailing competitive
      range), the financial strength and stability of the broker, the efficiency
      with which the transaction will be effected, the ability to effect the
      transaction at all where a large block is involved and the availability of
      the broker or dealer to stand ready to execute possibly difficult
      transactions in the future. Consistent with the Conduct Rules of the
      National Association of Securities Dealers, Inc., and subject to seeking
      most favorable price and execution and compliance with Rule 12b-1(h) under
      the 1940 Act, the Sub-Advisor may select brokers and dealers to execute
      portfolio transactions of the Fund that promote or sell shares of the
      Fund. The Sub-Advisor is specifically authorized, to the extent authorized
      by law (including, without limitation, Section 28(e) of the Securities
      Exchange Act of 1934, as amended (the "Exchange Act")), to pay a broker or
      dealer who provides research services to the Sub-Advisor an amount of
      commission for effecting a portfolio transaction in excess of the amount
      of commission another broker or dealer would have charged for effecting
      such transaction, in recognition of such additional research services
      rendered by the broker or dealer, but only if the Sub-Advisor determines
      in good faith that the excess commission is reasonable in relation to the
      value of the brokerage and research services provided by such broker or
      dealer viewed in terms of the particular transaction or the Sub-Advisor's
      overall responsibilities with respect to discretionary accounts that it
      manages, and that the Fund derives or will derive a reasonable benefit
      from such research services. The Sub-Advisor will present a written report
      to the Board of Trustees of the Trust, at least quarterly, indicating
      total brokerage expenses, actual or imputed, as well as the services
      obtained in consideration for such expenses, broken down by broker-dealer
      and containing such information as the Board of Trustees reasonably shall
      request.


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            d. In the event of any reorganization or other change in the
      Sub-Advisor, its investment principals, supervisors or members of its
      investment (or comparable) committee, the Sub-Advisor shall give the
      Advisor and the Trust's Board of Trustees written notice of such
      reorganization or change within a reasonable time (but not later than 30
      days) after such reorganization or change.

            e. The Sub-Advisor will bear its expenses of providing services to
      the Fund pursuant to this Agreement except such expenses as are undertaken
      by the Advisor or the Trust.

            f. The Sub-Advisor will manage the Fund Assets and the investment
      and reinvestment of such assets so as to comply with the provisions of the
      1940 Act and with Subchapter M of the Internal Revenue Code of 1986, as
      amended.

      3. COMPENSATION OF THE SUB-ADVISOR.

            a. As compensation for the services to be rendered and duties
      undertaken hereunder by the Sub-Advisor, the Advisor will pay to the
      Sub-Advisor a monthly fee equal on an annual basis to 0.50% of average
      daily net assets of the Fund without regard to any total expense
      limitation of the Trust or the Advisor. Such fee shall be computed and
      accrued daily. If the Sub-Advisor serves in such capacity for less than
      the whole of any period specified in this Section 3a, the compensation to
      the Sub-Advisor shall be prorated. For purposes of calculating the
      Sub-Advisor's fee, the daily value of the Fund Assets shall be computed by
      the same method as the Trust uses to compute the net asset value of the
      Fund for purposes of purchases and redemptions of shares thereof.


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            b. The Sub-Advisor reserves the right to waive all or a part of its
      fees hereunder.

      4. ACTIVITIES OF THE SUB-ADVISOR. It is understood that the Sub-Advisor
may perform investment advisory services for various other clients, including
other investment companies. The Trust and the Advisor further acknowledge that
the Sub-Advisor may form or serve as an investment advisor or sub-advisor to
future funds, which have the same, similar, or overlapping investment
objectives.

      The Sub-Advisor will report to the Board of Trustees of the Trust (at
regular quarterly meetings and at such other times as such Board of Trustees
reasonably shall request, subject to the limitation on personal attendance at
such meetings set forth in Section 2a) (i) the financial condition and prospects
of the Sub-Advisor, (ii) the nature and amount of transactions affecting the
Fund that involve the Sub-Advisor and affiliates of the Sub-Advisor, (iii)
information regarding any potential conflicts of interest arising by reason of
its continuing provision of advisory services to the Fund and to its other
accounts, and (iv) such other information as the Board of Trustees shall
reasonably request regarding the Fund, the Fund's performance, the services
provided by the Sub-Advisor to the Fund as compared to its other accounts and
the plans of, and the capability of, the Sub-Advisor with respect to providing
future services to the Fund and its other accounts. The Sub-Advisor agrees to
submit to the Trust a statement defining its policies with respect to the
allocation of business among the Fund and its other clients.

      It is understood that the Sub-Advisor may become interested in the Trust
as a shareholder or otherwise.

      The Sub-Advisor has supplied to the Advisor and the Trust copies of its
Form ADV with all exhibits and attachments thereto (including the Sub-Advisor's
statement of financial condition) and will hereafter supply to the Advisor,
promptly upon the preparation thereof, copies of all amendments or restatements
of such document.

      5. USE OF NAMES. Neither the Advisor nor the Trust shall use the name of
the Sub-Advisor in any prospectus, sales literature or other material relating
to the Advisor or the Trust in any manner not approved in advance by the
Sub-Advisor; provided, however, that the Sub-Advisor will approve all uses of
its name which merely refer in accurate terms to its appointment hereunder or
which are required by the SEC or a state securities commission; and provided
further, that in no event shall such approval be unreasonably withheld. The
Sub-Advisor shall not use the name of the Advisor or the Trust in any material
relating to the Sub-Advisor in any manner not approved in advance by the Advisor
or the Trust, as the case may be; provided, however, that the Advisor and the
Trust shall each approve all uses of their respective names which merely refer
in accurate terms to the appointment of the Sub-Advisor hereunder or which are
required by the SEC or a state securities commission; and, provided further,
that in no event shall such approval be unreasonably withheld.


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      6. LIMITATION OF LIABILITY OF THE SUB-ADVISOR. Absent willful misfeasance,
bad faith, gross negligence, or reckless disregard of obligations or duties
hereunder on the part of the Sub-Advisor, the Sub-Advisor shall not be subject
to liability to the Advisor, the Trust, its agents, officers, trustees,
employees or affiliates or to any shareholder in the Fund for any act or
omission in the course of, or connected with, rendering services hereunder or
for any losses that may be sustained in the purchase, holding or sale of any
security. As used in this Section 6, the term "Sub-Advisor" shall include the
Sub-Advisor and/or any of its affiliates and the directors, officers and
employees of the Sub-Advisor and/or any of its affiliates.

      7. LIMITATION OF TRUST'S LIABILITY. The Sub-Advisor acknowledges that it
has received notice of and accepts the limitations upon the Trust's liability
set forth in its Declaration of Trust. The Sub-Advisor agrees that (i) the
Trust's obligations to the Sub-Advisor under this Agreement (or indirectly under
the Advisory Agreement) shall be limited in any event to the Fund Assets and
(ii) the Sub-Advisor shall not seek satisfaction of any such obligation from the
holders of shares of the Fund, other than the Advisor, nor from any Trustee,
officer, employee or agent of the Trust.

      8. FORCE MAJEURE. The Sub-Advisor shall not be liable for delays or errors
occurring by reason of circumstances beyond its control, including but not
limited to acts of civil or military authority, national emergencies, work
stoppages, fire, flood, catastrophe, acts of God, insurrection, war, riot, or
failure of communication or power supply. In the event of equipment breakdowns
beyond its control, the Sub-Advisor shall take reasonable steps to minimize
service interruptions but shall have no liability with respect thereto.

      9. RENEWAL, TERMINATION AND AMENDMENT.

            a. This Agreement shall be effective as of September 12, 2007 and
      shall remain in effect for the Trust for no more than 150 days or until
      the shareholders of the Fund vote to approve or disapprove an advisory
      agreement with the Adviser, at a meeting called for such purpose,
      whichever is earlier.

            b. This Agreement may be terminated at any time, without payment of
      any penalty, (i) by the Advisor, by the Trust's Board of Trustees or by a
      vote of the majority of the outstanding voting securities of the Fund, in
      any such case upon not less than 60 days' prior written notice to the
      Sub-Advisor and (ii) by the Sub-Advisor upon not less than 60 days' prior
      written notice to the Advisor and the Trust. This Agreement shall
      terminate automatically in the event of its assignment.

            c. This Agreement may be amended at any time by the parties hereto,
      subject to approval by the Trust's Board of Trustees and, if required by
      applicable SEC rules and regulations, a vote of the majority of the
      outstanding voting securities of the Fund affected by such change.


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            d. The terms "assignment," "interested persons" and "majority of the
      outstanding voting securities" shall have the meaning set forth for such
      terms in the 1940 Act.

      10. SEVERABILITY. If any provision of this Agreement shall become or shall
be found to be invalid by a court decision, statute, rule or otherwise, the
remainder of this Agreement shall not be affected thereby.

      11. NOTICE. Any notices under this Agreement shall be in writing addressed
and delivered personally (or by telecopy) or mailed postage-paid, to the other
party at such address as such other party may designate in accordance with this
paragraph for the receipt of such notice. Until further notice to the other
party, it is agreed that the address of the Trust and that of the Advisor for
this purpose shall be 303 Broadway, Suite 1100, Cincinnati, Ohio 45202 and that
the address of the Sub-Advisor shall be 303 Broadway, Suite 1100, Cincinnati,
Ohio 45202.

      12. MISCELLANEOUS. Each party agrees to perform such further actions and
execute such further documents as are necessary to effectuate the purposes
hereof. This Agreement shall be construed and enforced in accordance with and
governed by the laws of the State of Ohio. The captions in this Agreement are
included for convenience only and in no way define or delimit any of the
provisions hereof or otherwise affect their construction or effect.

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IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be executed
and delivered in their names and on their behalf by the undersigned, thereunto
duly authorized, all as of the day and year first above written.

                                    TOUCHSTONE ADVISORS, INC.
Attest:

                                    BY
- ------------------------------           ----------------------------
                                         James H. Grifo
Name:                                    President
     -------------------------

Title:
      ------------------------

                                    FORT WASHINGTON INVESTMENT
                                    ADVISORS, INC.
Attest:

                                    BY
- ------------------------------           ----------------------------

Name:                               Name:
     -------------------------           ----------------------------

Title:                              Title:
      ------------------------            ---------------------------


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