Robin asks Magnum to fly to Sicily to rescue a beautiful young woman who is in the clutches of dangerous mobsters. The woman develops an immediate crush of Magnum, which puts his new relationship in jeopardy. Later, when the mobsters turn up on the island, trouble kicks into high gear.

Card shark Jeannie Lowry (aka "Texas Lightning") hires Magnum as her bodyguard at a high-stakes poker game aboard a luxurious yacht. But Magnum soon learns that the poker game is just a facade and Jeannie is hiding something about her true intentions. Magnum and Jeannie are forced to make a hasty escape from the yacht and become stranded on a deserted island, and are presumed dead.