Tom Guthrie tries to help a young teenage outlaw, William Bonney, aka "Bill the Kid", by sheltering him at the Red Ox. However, when a vengeful U.S. Marshal, Phillip Mondragon, rides into Sweetwater with his posse, Tom appeals to Bret for help. Now the partners have to smuggle Billy out of town and get him to Mexico. Meanwhile, Fred "The Butcher" McShane, a notorious outlaw, rolls into town and Philo figures that Mondragon is after him... and plans to collect the reward.
—Gislef