In search of a kidnapped boy, a gunslinger takes a young girl along for the ride. Rain looms over the prairie when Matt Holiday sees a gang of horsemen abduct the boy. The only man who could have kidnapped young Will Waverly is his father, an outlaw who rightfully belongs in prison. Holiday agrees to rescue Will, but the family demands he take something along: Will's spirited sister Serenity, whose beauty disguises one of the fastest guns in the west. Although the girl's presence irritates him, Matt cannot deny she's a crack shot. But can he trust her? The boy isn't the only thing missing: $20,000 in gold is gone, too, and there is no telling what the outlaw's daughter will do to get her hands on it.