A wrecked hideout and a fragment of a map send Lupin III toward an uncharted island in the Bermuda sea, with Jigen, Goemon and Fujiko called in and Inspector Zenigata working the same trail. The island is littered with rotting tanks and guns, a fog that kills anyone who breathes it for a day, and men who were discarded there as weapons. Its ruler, Muom, cannot be killed by ordinary means, so Lupin has to steal everything and get out inside a single day. This feature closes the standalone Lupin the IIIrd line.