Buddy Roosevelt, a notorious bandit known as the "Phantom," and his doppelgänger, drifter Jeff McCloud. Bull manages to throw suspicion on Jeff but is himself killed by Jim Breed (John Junior).
Lightnin' the dog and his master, Tom Harding are on to a group of smugglers who operate down at the harbor. Tom nearly bags them, but he's overwhelmed and they take flight. His girlfriend bluffs her way into the gang's hideout, but is discovered and held back. Tom is again overpowered by the crooks and thrown in a secret dungeon, but he fights his way out.
Lightnin' tries to save agent Eileen Sedgwick and her rich boyfriend from the infamous webs of the Spider.
