It is the Christmas Holidays and reformed thief, Boston Blackie goes to Castle Theater to pick up players who will perform for prisoners that are still in prison. He takes a girl with him who has a brother already in prison. She has visited the prison twice in the month, so is not suppose to visit again. However when the group is completed the girl is included as well as Inspector Farrady. One of the clowns in the show is kidnapped and replaced by a con who wants to get even with two ex-partners. Boston Blackie figures out that a con has replaced one of his clowns but is unable to stop him. Blackie's clothes are stolen and a murder is committed. Of course, the Inspector immediately suspects Blackie of being involved. Now it is Blackie's job to find the killer, exonerate himself and help the girl free her brother.
Chester Morris
Adele Mara
Richard Lane
George E. Stone
Lloyd Corrigan
Walter Sande
Larry Parks
George McKay
Cy Kendall
Paul Fix
Ben Taggart
Ernie Adams
Lloyd Bridges
Edmund Cobb
Harry Depp
Mike Donovan
Lester Dorr
Bud Geary
Kit Guard
Dave Harper
Al Herman
George Hickman
Dick Jensen
William Lally
Eddie Laughton
James T. Mack
Teddy Mangean
Sidney Miller
Eileen O'Hearn
Lee Prather
Frank Richards
Francis Sayles
Walter Soderling
Cyril Thornton
Duke York
Suzanne Ridgway