Marine Lieutenant Steve Landers has perfected a new bomb-release for airplanes which he is testing with the aid of his mechanics,'Singapore' Stebbins and Jack Murray. Dick Weber, one of a group of enemy agents attempting to steal the plans, is a friend of Colonel Dale, whose daughter, Linda, is engaged to Landers. Weber learns that "Singapore" and Jack are to deliver the final blueprints to the Colonel's home. Beckstrom , head of the spy ring, has some of his agents dress as Marines and obtain entry the the hangar. They get the plans but "Singapore" and Jack have overheard a conversation that indicates the spies are heading for a nearby island which is the headquarters of the espionage group.
Wallace Ford
as Pvt. 'Singapore' Stebbins
Toby Wing
as Linda Dale
Grant Withers
as Pvt. Jack 'Junior' Murray
Sheila Lynch
as Maisie King
Michael Doyle
as Lt. Steve Landers
Don Lanning
as Dick Weber
Frank Rasmussen
as Beckstrom
Roy Elkins
as Charles
James Neary
as Top Sergeant
Thomas McKeon
as Ciolonel Dale
Bil Baird
as Maxson the Magician (uncredited)
Beth Hayes
as Coffee-Counter Waitress
