Marine Lieutenant Steve Landers tests a new bomb-release technology with his mechanics, "Singapore" Stebbins and Jack Murray. Enemy agent Dick Weber, a friend of Colonel Dale, learns that the final blueprints will be delivered to the Colonel's home, where his daughter Linda is engaged to Landers. The spies, led by Beckstrom, infiltrate the hangar by disguising themselves as Marines and steal the plans.
The Marines Come Thru
A top-secret bomb-release system is targeted by enemy agents, who will stop at nothing to get their hands on the revolutionary technology developed by a team of skilled marine mechanics.
