Set in the eponymous German prison camp during WWII, the director's broad, black comedy focuses on a group of decidedly unheroic prisoners. While they spend most of their time trying to entertain each other with comedy routines and pin-ups, they also occasionally entertain thoughts of escape. But escape is the last thing on the mind of the hard, calculating Sefton, a wheeler-dealer who's salted away a stash of creature comforts which are the envy of the barracks. When a couple of prisoners are killed while attempting to escape, Sefton collects the money he won by betting against their success. The prisoners at once suspect Septon and after he is beaten up, he himself determines to find the real spy and the result is a mixture of intrigue and betrayal leading to a heart pounding conclusion.