The Loner has searched the frontier for his missing children and their vengeful, runaway mother. Now, in fog-shrouded San Francisco, his search ends—and the fight begins.

Conrad Browning is The Loner, a man on a mission, crossing the country—and crossing a lot of bad mento rescue his kidnapped young twins. The trail has led him all the way to San Francisco's perilous red light-district, where a crime lord is the proud father of newly adopted twins. The Loner knows his children when he sees them. But they're hostage to a brutal, violent mob feud. Then, just when he needs it most, The Loner is no longer alone: he is joined by his own father, Frank Morgan—the most notorious gunman in the West.

A family's pain. A woman's betrayal. A city exploding in violence. The Loner has come to the right place to save his children. But will they get out of Frisco alive?