When a young man is befriended by a gambling ship operator and made a partner in the business, he becomes involved in a police manhunt after he covers up a murder committed by his new partner.
A cowboy saves his injured friend from a vigilante group, which believes that he is part of a bandit gang that attacked a wagon train. The cowboy sets out to find the bandit gang and clear his friend's name.
A gang of horse thieves are able to operate because the crooked local sheriff is in cahoots with them. When Tom Mix's beloved horse Tony Jr. is stolen, he steps in to break up the gang.
