Retired gem merchant Peter J. Martin hires detective Dan McRae to guard a large diamond which he plans to present to his daughter Ruth on her twenty-first birthday. Notorious jewel thief Gentleman Joe overpowers McRae, however, and takes his place at Ruth's party.
as Gentleman Joe, the Cracksman
as The Uncle
as Harold Martin
as Harold's Sister
as Captain Dan McRae
as Violet Dane
as June Day
as Robert Kendall
as Nicholas Moses
as Officer Jim Buckley
as Redman Day
as District Attorney
