When the details of a secret torpedo are destroyed by an incompetent seaman, the crew of the ship rally round, when the Admiral needs the plans to show to a visiting scientist.
A disparate group of volunteers are trained as saboteurs and parachuted into Belgium to blow up an office containing important Nazi records and to rescue a prominent S.O.E. agent, who is being interrogated by the Germans for vital information.
Jeckie Farnish is a level-headed young woman, unlike her spoiled younger sister, Rushie. When the sisters become involved with charming businessman Charles Mortimer, the resulting tragedy leads to a lust for revenge on Rushie's part. However, Jeckie knows that she can always turn to reliable Joe Bartle in times of need.