First episode in the TV series. Six Texas Rangers, led by Captain Dan Reid, are ambushed in a canyon by the outlaw, Butch Cavendish and his gang. One ranger, Reid's brother John, survives the attack. He is found and nursed back to health by an old friend from his childhood, an Indian scout named Tonto. The younger Reid fashions a mask from his slain brother's vest, and becomes the Lone Ranger.