Edward Pierce est un voleur de génie qui met au point un plan brillant : s'emparer d'une fortune en lingots d'or dans un train de convoyage de fonds. Mais pour réussir le coup le plus audacieux de l'histoire, Pierce doit s'allier à un perceur de coffre, Robert Agar. Le duo va s'unir pour une série de cambriolages qui mettront leurs nerfs, leur amitié et leur adresse à rude épreuve…

In Old Wyoming, a gang is plundering stagecoaches of shipped currency and a crusading newspaper editor is trying to get the local marshal replaced, because of his apparent failure to catch the gang, which seems to disappear into thin air after every robbery. The situation escalates when one of the stage drivers is mortally wounded; so the marshal sends for his friends, the Range Busters, to help him catch the criminals. Meanwhile, even the marshal's fiancee, the editor's daughter, turns against him in favor of an aggressive agitator for law and order - who secretly is leading the robber gang.