Six Texas Rangers are on the trail of the Butch Cavendish gang.The gang sets an ambush and kills all Rangers except one who lies dying on the trail.The dying Ranger is found by Native American Tonto and nursed back to life.After he recovers the Ranger vows to become a vigilante and bring all outlaws to justice.He starts wearing a black mask to hide his identity.A silver mine provides him with wealth to finance his quests and also with silver bullets.He names his stallion Silver.His friend,Tonto,helps him fight crime and together they become legends as they travel throughout Texas and the American Wild West.