Federal Deputy Sullivan Hart arrived too late to rescue his father. But the elder Hart managed to identify his killers before he died by scrawling "Los Pistoleros" in his own blood. This outlaw gang has been involved in everything from cattle rustling to running guns without getting caught. Hart aims to end that lucky streak. But he isn't the only one. Quick Charlie Sims, gambler and con man, has his own debt to settle with Los Pistoleros. And he's got to do it without letting Hart get involved -- because Sims is a wanted man, too.