Perhaps adolescent boys have had better reasons to run away from home than young Sammy Moore, but Sammy might never have done anything about it had he not encountered the tramp named Lefty and his trained bull terrier. The appeal that life on the road with these two offers is one of continuous adventure, so Sammy heads west. Swept along through a trail of unfortunate events, Sammy finds himself as front man for a giant hunchback named Jake and his thugs in engineering a daring bank robbery.