Three teenagers encounter a ghost who is in limbo until he retrieves his lost head. They do their parts to help him find it.

Bumbling navy officer Lieutenant Humphrey Fairweather (David Tomlinson) is transferred to HMS Berkeley, an old World War II destroyer, to keep him out of harm's way. But together with Chief Petty Officer Doherty (Peter Sellers), Fairweather gets into more trouble than might be thought possible, with events coming to a riotous conclusion when the Admiralty turn up for an inspection of the ship.

Set in a Japanese prisoner of war camp during World War II, the film focuses on the brutality and horror that the allied prisoners were exposed to as the Japanese metered out subjugation and punishment to a disgraced and defeated enemy. This harrowing drama concentrates on the deviations of legal and moral definitions when two opposing cultures clash. Although fictional, this was one of the earliest films to deal realistically with life and death in a Japanese prisoner-of-war camp during the Second War.