When a plane carrying an atomic warhead crashes on a South Pacific island, Steve is sent to retrieve it, but finds that an ex-Japanese Zero pilot, Kuroda, has taken it to his home. Steve must successfully navigate his way through the booby-traps and get the warhead before a rogue guerrilla group does.

When Kuroda is asked to track down a wolf boy roaming the island forests of Hoyoko, Japan, he asks for only one man to help him: his friend Col. Steve Austin.