In this second film compiled from episodes of a Japanese TV serial, Captain Joe, reformed interstellar marauder Ken and the rest of the crew of the Bacchus-III set off to destroy an alien race's super-weapon.
A moon base is destroyed by a spaceship from Zigra which is looking to take over the planet earth to use its oceans for its ocean-dwelling denizens. Gamera must once again come to the aid of the human race while all of Japan roots him on.
