Larry Willis and Bill Wane are security guards who ride in the back of Banks Co. armored trucks. When they barely avoid a robbery, they return to headquarters, where their boss John Hale introduces them to detective Tom Sheridan, who will be working with them to uncover a new gang of robbers.

The inventor of a new top-of-the-line burglar alarm system is kidnapped by a gang in order to get him to help them commit robberies.