For the last five years, Jeremiah Dylan had been earning himself a reputation across the southwest as a bounty hunter, a man who could bring in any criminal from horse thief to murderer, and never gave second chances. But when he takes a job for the Union Pacific, things quickly go off the rails.

The request had been simple. Ride guard on a railroad pay wagon from Tucson to Silver City to deter the gang of outlaws who had been robbing the shipments. But when Jeremiah Dylan rides into Tucson and straight into the middle of a bank robbery, the stakes change.

Now, he's on the trail of the outlaws, the stolen loot, and a mysterious notebook the railroad agent in Tucson seems desperate to get back. But he soon realizes he isn't the only one on the hunt...

He'll have to face outlaws, a rival bounty hunter, and the searing heat of the Arizona desert to bring in his bounty.