The head of counter-espionage Harding (Howard St John) recounts to a radio commentator how a key operation went down during the war. Information is leaking out of a facility where the US Navy is developing it's torpedoes.
Naval officer Baldwin (Willard Parker) is sent in to try and uncover the agent. Unbeknownst to Baldwin, one of the agents (Audrey Long) is very close to his heart...
This is a fine procedural, giving us a view of early counter-espionage efforts and the careful uncovering of a group of spies, but also how the spies themselves operate.
A tough film with Noir touches but the spy game is one of the hardest games of all.