Wealthy Mrs. Carroll has spent fourteen years in a small mental sanitarium, and only her daughter Phyllis, as she comes of age, suspects that she has been conveniently put- and kept-away by her second husband, Norman. Confiding her fears to insurance investigator Jeff Di Marco, Phyllis is too late- with too little, as Mrs. Carroll dies before an inquiry can be made, but Di Marco, refusing to drop the case, brings in the final proof of murder.... A tranquilizer, for feminine tastes in the field.