This 15-chapter Columbia serial is largely set on a remote Carribean island (which looks suspiciously like Catalina). Reporter Larry Kent (Don Terry) arrives on the island to investigate the disappearance of another newshound. It turns out that somewhere in the area is buried a valuable treasure, for which there exists half of a map. Toni Morrell (Gwen Gaze), the daughter of an old salt whose murdered partner knew the location of the treasure, joins forces with Larry to solve his friend's disappearance-and, hopefully, dig up the buried loot. They are opposed at every turn by the evil Collins (Walter Miller), who has a seemingly endless supply of weapons, land mines and henchmen at his disposal. Adding to Larry and Toni's burden is the presence of the mysterious Dr. X (Hobart Bosworth), who is hard at work developing a new and powerful explosive. And as if that weren't enough, Larry is obliged at several junctures to battle an unknown assailant disguised as a 17th century pirate.
by Hal Erickson synopsis