My question involves landlord-tenant law in the State of: Missouri

I am in the process of buying an multi-family house that has an existing tenant that has signed a one year lease. Not knowing the details of the tenant or the signed lease at this point, I am nervous about the tenant that I am going to inherit. Is it possible to modify or revoke the lease agreement once I take ownership of the property if i do not feel comfortable with the tenant/lease agreement?

Thanks in advance for your help