When prospector William Crowley found a fabulous diamond, he thought he'd made his fortune, but three months later he lost it in a poker game. William never saw his diamond again.

Fifteen years later William's son Jackson discovers that the diamond is again at stake in a poker game, this time presided over by the entrepreneur Meeker Trent. With the help of his father's old friends Finbar Stuart and Preston McBryde, Jackson vows to win it back.

But the game attracts a motley collection of card sharks and gunslingers, and they soon discover that winning the game will be only half the battle. The hardest task will be staying alive for long enough to leave the poker table.