Blackie performs in a magic show at a women's prison, which gives an inmate an opportunity to escape.
Chester Morris
as Horatio 'Boston Blackie' Black
Trudy Marshall
as Irene
Constance Dowling
as Dinah Moran
Richard Lane
as Inspector Farraday
George E. Stone
as The Runt
Frank Sully
as Sgt. Matthews
Warren Ashe
as John Lampau, alias John Jani
Selmer Jackson
as Warden Lund
Wanda Perry
as Secretary (uncredited)
