A Pinkerton detective goes undercover to infiltrate Butch Cassidy and the Wild Bunch, posing as an outlaw to get close to Kit Banion, a powerful saloon and hotel owner known as the Maverick Queen. Kit, a Virginia-born beauty who built her fortune in post-Civil War Wyoming, is secretly in league with the notorious gang. When the detective enters her life, romance and danger collide in the untamed West.