The Texas Rangers chase down a gang of outlaws led by Butch Cavendish, but the gang ambushes the Rangers, seemingly killing them all. One survivor is found, however, by an American Indian named Tonto, who nurses him back to health. The Ranger, donning a mask and riding a white stallion named Silver, teams up with Tonto to bring the unscrupulous gang and others of that ilk to justice.

A retired spy is called back into action, and to bond with her new step-children, she invites them along for the adventure to stop the evil Timekeeper from taking over the world.