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.
Lightning the German Shepherd
as Lightnin' - the Super Dog
Gary Cooper
as Tom Harding
Eileen Sedgwick
as Babe the Vamp
Frank Lackteen
as The Master Criminal
Zalla Zarana
as Mazie La Fere
Walter Maly
as Randall Myers
