A crotchety, old ex-attorney solves the violent theft of a priceless diamond from his nephew.

Julie Cavendish comes from a family of great Broadway actors. Her mother Fanny staunchly continues acting. Her boisterous brother Tony is fleeing a breach of promise suit in Hollywood. Her daughter Gwen must decide between going on stage, or settling down in a conventional marriage. Julie is just thinking that it would be nice to retire and get married, when who should turn up but her old beau, Gilmore Marshal, the platinum magnate from South America.