Desmond Cory

Cat burglar Henry Clarke and his accomplices the Moreaus attempt to steal diamonds from the chateau of millionaire Salinas.

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.