Bill is discharged from Bar K Ranch and in his desperation decide to turn train robber. On his way to town he rescues Myrtle Mulligan, who has been driven from protection to the high branches of a tree by a vicious bull. Arriving in town Bill applies to the superintendent of the railroad and secures a job as track walker. Pinto Joe, a friendly Indian, learns of Bill's train wrecking plans, and tells Myrtle about it. Hearing Bill intends to dynamite the bridge the plucky girl decides to take a hand in the game. Arriving on the scene just afte...