Spotty is a yippy little dog living as an outlaw with his owner near the Mexican border.
When the Manson gang pulled a stagecoach heist and was stuck with their prisoners on a mountainside, Spotty took a liking to a young lady named Joan Carter, despite the fact she was a yankee.
The group needed to skedaddle from that place before Shoshone indians attacked and Stew asked Joan to take care of Spotty when they made a run for it. Joan agreed, but Spotty had other plans. He jumped from her arms and ran faithfully after his master.
Stew met a violent end with a Shoshone bullet during the escape attempt. When the Shoshone were driven off, Spotty stood vigilant at the impromptu memorial erected for his owner by a tall, dark-haired scout.