A cowboy is forced to become a fugitive after being falsely accused of killing a champion racehorse. He later discovers that his mare is pregnant by the dead animal and raises the foal to adulthood. His new steed proves remarkably intelligent, and a useful ally in clearing his name. Western, starring Roy Rogers and George `Gabby' Hayes.

Gabby doesn't want to breed his horse the Golden Sovereign with Roy's. When Sovereign and Roy's horse escape, the Sovereign gets shot accidentally by Skoville but Roy is blamed and jailed. A year later Roy returns with Trigger, the son of the Sovereign. When Skoville reveals he was present when the horse was shot, Roy sees an opportunity to clear his name.