An American bartender and his prostitute girlfriend go on a road trip through the Mexican underworld to collect a $1 million bounty on the head of a dead gigolo.
Forced to trade his valuable furs for a well-educated escaped slave, a rugged trapper vows to recover the pelts from the Indians and later the renegades that killed them.
At a Mexican ranch, fugitive O'Malley and pursuing Sheriff Stribling agree to help rancher Breckenridge drive his herd into Texas where Stribling could legally arrest O'Malley, but Breckenridge's wife complicates things.
