Dan Coughlin, a ranger, comes upon a band of smugglers and succeeds in capturing one of them, a half-breed Mexican, "Easy" Joe by name. Joe is taken to headquarters and locked up, while all efforts to wring a confession from him as to the whereabouts of the band's rendezvous have failed. It is not long, however, before the others of the gang make an effort to liberate their pal and send an Indian to spy upon Dan and other members of the troupe.