Cahill Bowman and his Shadow Box Gang invade Silverton, Nevada, and make away with some sixty pounds of gold from the McQueen Mine's bullion room and take Marshal Walter Nation's daughter Elly along for insurance when they leave. But before they ride out, they nail Walt Nation to the wall and slit his belly open, just to leave a message. Young Matt Stryker, deputy marshal of Silverton, must ride at the head of a posse made up of a black Seminole Indian, a woman stage driver, the town drunk, a former captain in the Union Army, a kid who's looking to make a name as a gunfighter, and a dude that don't know which end of a horse to ride. The Shadow Box Gang rides on, raping and killing as they go. Will Stryker's posse be enough to bring them in?