Ken has just moved from Kansas with his mother. He talks to a girl named Julie, not knowing that her boyfriend Tom is very possessive of her. Tom is learning karate from Lee, a sensei whose brother was killed by a rookie cop named Billy. Billy has since then become the janitor of the school that Ken, Julie and Tom go to. When Ken gets beaten up by Tom for talking to Julie again, Billy helps Ken by teaching him how to defend himself, which eventually leads to a battle between student vs. student, and sensei vs. sensei.

When Angelino Jack Robinson gets a new job in Australia, he decides to take his sissy wife Ann, brave sons Shane and Todd and wining daughter Elisabeth 'Lizzy' by sailing yacht from Hong Kong to Syndney. The gun he gets thrown in by Sheldon Blake proves disabled, and for a sinister reason: near Borneo, Blake's men turn up to capture them. The family escapes but loses the yacht on a reef. They build a cool camp on an island. But the pirates keep coming back, and the boys discover why: he hid a treasure in the yacht. Shane is also discovered and captured in more then one way by French plane wreck survivor Françoise, who later teams up with the family.

Two brothers have half of a powerful ancient Chinese talisman. An evil gang leader has the other half, and determines to get the brothers' half and have a complete medallion so he can gain absolute power.