In this gamble, more than a few poker chips are at stake.

When an Army Air Force Major vanishes from his Top Secret job at the Fort Worth airbase in the summer of 1947, down-on-his-luck former Ranger Jefferson Sharp is hired to find him, because the Major owes a sizable gambling debt to a local mobster. The search takes Sharp from the hideaway poker rooms of Fort Worth's Thunder Road, to the barren ranch lands of New Mexico, to secret