Lured by the promise of the gold rush, Cam Sutton leaves his cow-herding job for the deposit-rich gulches of the Black Hills. But his carefree journey is interrupted when he rescues Mary Bishop and her daughters from a stagecoach holdup. Cam accompanies them on their search for Mr. Bishop, only to discover that he's been murdered in Custer City, leaving behind a share of a lucrative gold mine to his family. Now Cam must find a way to escort the Bishops and their fortune home to Colorado. But greedy, cold-blooded killer Cotton Roach is fast on their heels, and he won't stop until he gets the gold.