Based on the 1930's comic strip, puts the hero up against his arch enemy, Shiwan Khan, who plans to take over the world by holding a city to ransom using an atom bomb. Using his powers of invisibility and "The power to cloud men's minds", the Shadow comes blazing to the city's rescue with explosive results.
In a futuristic world where the polar ice caps have melted and made Earth a liquid planet, a beautiful barmaid rescues a mutant seafarer from a floating island prison. They escape, along with her young charge, Enola, and sail off aboard his ship.