Stephen Neale is released into WWII England after two years in an asylum, but it doesn't seem so sane outside either. On his way back to London to rejoin civilization, he stumbles across a murderous spy ring and doesn't quite know to whom to turn.

Humble stamp dealer Otto Becker has little to do with international politics, so when he receives a surprise visit from his estranged twin brother and Nazi spy, Baron Hugo von Detner, his world is thrown into turmoil. Threatening Becker with deportation, Hugo forces him to use his shop as a front for espionage.

Lucky Jordan is a gangster living in New York City and when he's drafted into the army, he tries to escape duty by using an old con woman named Annie to convince the draft board he's needed at home. When that fails, Jordan is sent to boot camp, but he doesn't stay there long. He takes a beautiful USO worker hostage and flees back to New York. There, he learns that a rival gangster is plotting against America.

FBI agents Carl Becker and John Trent raid a New York City hotel, sending Nazi spies to an upstate hunting lodge.

Government agent Dick Barton battles a ring of Nazi spies who are planning to poison the entire London water supply.

Three-time tennis champion Alice Marble defies her coach, leaves the sport to become an Allied spy, gathering crucial Nazi intel for the Nuremberg trials.

A beautiful Austrian refugee in England--who is also a Nazi agent--marries a scholarly English pacifist. He lives near a secret military base she needs to get information about so she can help in Hitler's planned invasion of England.

An American ballistics expert in Turkey finds himself targeted by Nazi agents. Safe passage home by ship is arranged for him, but he soon discovers that his pursuers are also on board.

Great Britain, 1944, during World War II. Relentlessly pursued by several MI5 agents, Henry Faber the Needle, a ruthless German spy in possession of vital information about D-Day, takes refuge on Storm Island, an inhospitable, sparsely inhabited island off the coast of northern Scotland.

Broadway gamblers stumble across a plan by Nazi saboteurs to blow up an American battleship.

Allied spies and Nazi Agents insinuate themselves at a Scottish cottage (converted to a wartime hospital) with interests on an inventor's nearly perfected bomb sight.

When the Dutch resistance brings in Carla Van Oven to spy on the Nazis, Col. Pieter Deventer initially suspects she could be a double agent. Van Oven eventually convinces Deventer of her character, and when she is sent into occupied territory, she joins up with a rebel leader known as "The Scarf". As the resistance endures severe losses and their missions fail, Deventer starts to wonder whose side Van Oven is fighting on.