While the Civil War rages on between the Union and the Confederacy, three men – a quiet loner, a ruthless hitman, and a Mexican bandit – comb the American Southwest in search of a strongbox containing $200,000 in stolen gold.
Two bounty hunters both pursue the brutal and sadistic bandit, El Indio, who has a large bounty on his head.
As the railroad builders advance unstoppably through the Arizona desert on their way to the sea, Jill arrives in the small town of Flagstone with the intention of starting a new life.