Three bandits, pursued by the Indian chief Red Wolf and his warriors for stealing their furs, find the cabin of settler Jennings and demand his ammunition. Jennings, who is Red Wolf's friend, only helps the men after being threatened. When the Indians arrive, Jennings and his wife are killed in the crossfire while trying to protect their infant son Jack. Before he dies, Jennings asks Red Wolf to rear Jack. Five years pass, and Red Wolf, who has treated Jack as his own son and taught him never to lie, takes Jack to the U.S. Customs Indian agent, Clark, and asks him to adopt Jack and send him to school. When Jack is an adult, he makes his adopted fathers proud as he works with Clark to protect the Indians. One day, Jack sees a gang robbing two Indians of their furs, and while Jack catches two of them, one escapes. The fleeing bandit, Al Pearce, goes to the Crystal Hotel, owned by local bigwig Butch Weldon, and tells Butch that Jack captured their men. Butch and Al squabble over what action to take and also over Peggy, Butch's new singer and Al's girl friend. Peggy flirts with both of them, but tells Al that she loves him best. He replies that after selling their next load of furs, he and Butch are through. Butch overhears their conversation and plans to get rid of Al. Meanwhile, Jack confides his suspicions that Butch is the gang's ringleader to Clark and Red Wolf, and they warn him that he will need solid evidence because Butch has so much influence. Jack then goes to greet his childhood sweetheart, Clark's daughter Mary, who is visiting from school. After he sees her, Jack goes on patrol and catches Al with furs bearing the company tag, which marks them as Indian and government property. Butch ambushes them as they talk and, after knocking Jack out, murders Al and shoots one shot from Jack's gun, thus making it appear that Jack killed Al. Jack regains consciousness and takes Al's body to town, where he confesses to Clark that he does not know if he killed Al or not, and that the stolen pelts are missing. Clark reluctantly arrests Jack, after which Peggy hysterically calls him a murderer. Later, Clark orders two deputies to take Jack to the county seat, as Butch's gang is threatening him. They are followed by Peggy, who shoots at Jack and believes she has hit him after he falls from his horse. Jack is not harmed though, and goes to Red Wolf for advice. Red Wolf devises a trap for Butch and sends Jack, disguised as an Indian, with Young Bear to try to sell company furs to Butch. Jack, Red Wolf and the other Indians trap Butch, and after Jack gets Butch to write a confession stating that he killed Al, Red Wolf forces Jack and Butch to exchange clothes. Red Wolf then sets Butch free, and just after he leaves, Butch is killed by Peggy, who thinks he is Jack. Before he dies, Butch confesses his guilt to Peggy, and Jack, now cleared, kisses Mary.
