Claude Duval thought he was through with rustlers and killers when he left Texas for Wyoming. But the retired livestock detective soon finds ranch hands turning up dead and cattle missing. It looks like the work of Lone Wolf Wolverton, who murdered Duval's partner years ago.

But Lone Wolf, who's done his time and gone straight, rides to Duval's ranch looking for a chance to prove he's being framed. Out of leads, the lawman reluctantly accepts help from the man he's sworn to kill, and the unlikely pair teams up to track down the real rustlers and killers, the Snowy Range Gang.