When Johnny Matlock whisks away a cold war secret from under the noses of Berlin's top secret agents, his every move is followed when he returns to England. His girlfriend Paula is kidnapped but her handbag is discovered at the scene of the crime by the aristocratic private eye, Duke Martin. Inside it he discovers the secret formula that the agents are searching for and tracks down her sister Paula. As Johnny grows frantic for the safe return of his girlfriend, Duke Martin plays a deadly game of double bluff with the enemy agents.
as Tom Martin
as Barney
as Paula Grant / Paula Jackson
as Johnny Matlock
as Webb
as Pat
as MacAllister
as Michael Matlock
as Diane Grant
as First Kidnapper
as Second Kidnapper
as Mitchell
as Professor Dohlmann
as Miss Freda Dohlmann
as Berlin Man
