Mike Sturges and his younger brother, Roy, are sentenced to Yuma Penitentiary on a trumped-up train robbery charge. Both endure cruel treatment before Mike escapes to extract revenge on their enemies.
The mission: search out and destroy a radio station in Normandy before the D-Day invasion. The volunteer commandos, misfits from the American army do not care how its done and will run over anyone who gets in their way.