The story (based on a novel by James Hadley Chase) concerns the efforts of the genial and deceptively tentative Lepski (Michael Brandon), an insurance company detective, to track down a valuable medieval Russian icon, which was stolen by Bradley (David Carradine), a master thief.

After an American Navy base is annihilated by a secret weapon, Agent OSS 117 is sent to Japan to investigate the organization that's claiming responsibility, and threatening the US with another attack, if they don't pay.