Raoul Leduc is a police inspector trailing a spy who plots to kidnap an important American atomic scientist. Joe Victor a gangster who is hired to carry out the abduction, balks when he learns what is at stake and helps Leduc out instead.

Having been a spy for Quantrill's raiders during the Civil War, Jeff Travis thinking himself a wanted man, flees to Prescott Arizona where he runs into Jules Mourret who knows of his past. He takes a job on the stage line that Mourret is trying to steal gold from. When Mourret's men kill a friend of his he sets out to get Mourret and his men. When his plan to have another gang get Mourret fails, he has to go after them himself.

Elmer O'Dare fancies himself an expert circus performer.