Mo. Rev. Stat. § 376.650
If the death of the insured occur within the term of temporary insurance covered by the value of the policy as determined in section 376.630, and if no condition of the insurance other than the payment of premiums shall have been violated by the insured, the company shall be bound to pay the amount of the policy, the same as if there had been no default in the payment of premium, anything in the policy to the contrary notwithstanding; provided, however, that notice of the claim and proof of the death shall be submitted to the company in the same manner as provided by the terms of the policy within ninety days after the decease of the insured; and provided also, that the company shall have the right to deduct from the amount insured in the policy the amount compounded at six percent interest per annum of all the premiums that had been forborne at the time of the decease, including the whole of the year's premium in which the death occurs, but such premiums shall in no case exceed the ordinary life premium for the age at issue, with interest as last aforesaid.
§ 376.650, RSMo