Higgins sends Magnum to collect a valuable Kenzan porcelain plate, newly purchased by Robin Masters, from the airport, but the artefact, which was entrusted to the care of a Samurai warrior while in transport from Japan, has been stolen. At first, Thomas thinks the whole thing is a joke, especially when the Samurai, Tozan, claims that the plate was stolen by a ninja, but the situation is for real, and the pair team up to try and find the stolen artefact. But they must work fast, as Tozan's centuries-old culture dictates that he must commit sepuku – which means taking his own life – if the precious plate isn't retrieved...

Mac's latest shady money-making scheme has landed him in trouble with the Japanese Yakuza, so he convinces Rick to buy a sailboat from him, complete with a crew of three Japanese women who barely speak a word of English. Rick is furious when Mac skips town just before the boat is impounded because Mac didn't own it in the first place, leaving Rick unable to repay Ice Pick the $20,000 he borrowed to buy the yacht, now that he can't make the money he planned by renting the boat out for charters. To get Rick's money back and keep the Yakuza and Ice Pick from doing him harm, Thomas sets out across the mainland to track down Mac.