Western lawman Bat Masterson sets out to prove a man standing trial for murder is innocent.

Two-fisted newsreel photographer Johnny Williams is stationed in Burma and China in the early stage of WW II. Captured by the Japanese, he escapes from a concentration camp with the aid of beautiful, enigmatic 'China Girl' Miss Young. The two arduously make their way back to friendly lines so that Johnny can deliver the vital military information he's managed to glean from his captors.

Cruze arrives in town and when he stands up to the three Moran brothers, he gets appointed Marshal. First the brothers kill a rancher while framing another man. But when the jailer is murdered, Cruze gets evidence the Morans did it. He tries to raise a posse to chase them down but the townsmen refuse to go. So he rides off by himself to face the three of them.