A familiar voice on the radio leads Magnum to Holly Hudson, a popular Saigon disc jockey. Magnum discovers that Holly's been the recent victim of some very vocal death threats, but she's more concerned about the whereabouts of her missing fiance.

The Little League International Goodwill Tournament becomes a site of terror for the young Crown Prince of Jororo, who plays center field for the visiting team. Magnum befriends the young boy and puts his own life on the line when he finds out there is a royal assassination plot in play.