The Canyon of Light.

The story begins as Tom Mills (Tom Mix) rides off to fight in WWI. Leaving his ranch in the care of his sister Ellen (Carmelita Geraghty) and her husband Ed (Carl Miller) Mills returns from the battlefield two years later to find that his brother-in-law has deserted, and the ranch is in a state of ruin and disrepair. Even worse, Ed is now top man in a vicious outlaw gang.