John Evans tells his grandson about the exciting days of '75 in the West. At Fort Sheridan, Captain Evans fights the Indians of the plains, while his wife Martha grows bored of the monotonous life at the fort. One day, while Evans is helping to rescue a wagon train surrounded by Indians, Martha elopes with trapper Brett Arnold. When Evans returns, he resigns from the army and takes his young son Jimmie to Montana, where he becomes a ranch foreman. Martha, who immediately became disgusted with the drunken Arnold and jumped from their stagecoach during their elopement, now sings in dance halls to earn a living. A year later, when Evans -- who has kept away from women -- and Jimmie are in Red Butte for trading, Jimmie's dog runs into a saloon. Jimmie follows and finds his mother. After Evans thrashes Arnold, who also has found Martha, Jimmie reunites his parents.