Val Foreman
Tom Foreman
Ollie Milton
Cat Devlin
Dave
Det. Sgt. Rees
Det. Insp. Sayers
Prison Governor
Miss Davis
Dr. Crampton
O'Brady
Connolly
Mr. Evans
Helen
Policeman
Police Doctor
Tom Foreman kills a policeman after stealing jewellery worth a fortune. He is caught and incarcerated. Prison psychiatrist Ollie Milton and Tom's wife, Val, enlist the help of ex-con "Cat" Devlin in their plot to locate the hidden jewels.