Ever since Son o' the Stars was an infant, Wapita has been his guardian. Now he is a young man twenty-five years old, and because of the color of his skin, which has been browned by his outdoor occupations, and the shape of his eyes, he is taken for a half-breed. Wapita, who is a dumb Indian, has taught the young man the Indian sign language, and the two have lived happily all these years. One day Son returns after a protracted visit at the trading post presided over by Brent, and he tells Wapita that while there he met Madeline, the daughter of the trader, and that in order to be in her presence he made a lot of purchases. He continued to make purchases until he saw Madeline bestow her affection upon Poleron Dore, when he made his departure. Son is always at the post thereafter. This provoked Dore, and he asks Brent if he would permit the affectionate advances made by Son, whom he characterizes as a half-breed, towards Madeline lo be continued. Brent voices his objections, and with Dore goes home to look for his daughter. She is not there, however, for Son had been there, proposed, was accepted and then took her to Wapita. Brent and Dore trace them to Wapita's cabin, where Brent tells Son that if he is ever caught with his daughter again that he will be killed. Heartbroken, and after heaping curses upon his race, Son falls asleep. Son's extreme sorrow and his denunciation of the Indian race brings memories of the past to Wapita. In the visualization we are shown how Son came to be the charge of the Indian. Marie Lacouvrer is loved by two men. Jack Reid, an artist, and Robert Reynolds, a millionaire. Marie marries the rich man, an incident which breaks the heart of Jack. Time passes and Jack becomes a famous artist. He meets Marie while on a mountain trip and learns that she is greatly disappointed in her husband, who has become brutal. Then Marie receives news that her husband is drowned, and several months later Jack and she are married. Their union is blessed with a baby boy. Suddenly one night Reynolds returns and demands his wife. In the duel that is fought, Reynolds fires before the count, wounding Jack. He, his wife and baby manage to escape to the tent of Wapita. They are trailed by Reynolds, but before he can kill Jack, the latter fires and instantly kills the intruder. The next day the soldiers arrive and take the body away. Fearing that he will break down at the trial and reveal who committed the murder, thereby breaking his promise to Jack not to tell, as he could see the justice of the act. Wapita cuts out his tongue. He is thereby unable to make any statement and Jack is set free. Not long after this incident, Marie dies. Jack, leaving his baby son in the care of Wapita, goes to the hilltop where his wife is buried to give vent to his grief. There he is attacked by Waena, the sweetheart of Wapita. who blames him for the sacrifice her sweetheart made. She thrusts her knife into his breast and he dies. The visualization fades out upon Wapita gazing at the sleeping young man who has been condemned because he is thought to be an Indian. Wapita knows that Waena can prove his parentage, and he goes to get her. While he is gone, Son decides to go out of the life of Madeline forever, but before leaving he determines to see her once more. Preparations at the post are in progress for the wedding of his beloved and Dore. He locates her in her room and claims her, and together they flee down the river. Meanwhile Wapita has found Waena. The lovers are pursued by Brent and Dore. They all meet at the cabin of Wapita, where Waena produces evidence that Son is a white man. Madeline and Son are later married.