The Mystery Club, five elderly women who live at the Rose Plaza and discuss mysteries written by women,  have no idea of the consequences when Viola Cartwright, their blind member,  asks them to go over her  Medicare bills. That takes them to a phony clinic and leads to suspicion about the real identity of her personal assistant, Dorothy Anderson. Soon the investigation of Medicare bills leads them into a sinister underworld of fraud and revenge, to murder and tragedy.  Only raw courage in the face of evil can save the elderly women.