A movie serial in 12 Chapters: US naval officer Don Winslow is given command of Tangita Island, near Pearl Harbor, where a ring of saboteurs is trying to destroy ships carrying supplies to the troops stationed in the islands and sabotage the war effort under orders from an unknown leader.
Don Terry
as Cmdr. Don Winslow
Claire Dodd
as Mercedes Colby
John Litel
as Spencer Merlin
Walter Sande
as Lt. Red Pennington
Anne Nagel
as Misty Gaye
Wade Boteler
as Mike Splendor
Ben Taggart
as John Blake
John Holland
as Paul Barsac
Lane Chandler
as Henchman Corley
Ethan Laidlaw
as Henchman Spike
Peter Leeds
as Seaman Chapman
Robert Barron
as Henchman Prindle
