Gigantron is the Queen of all Kaiju - capable of leveling whole cities with her fiery breath. When her egg is stolen by the Kaiju Defense Force she swoops into the city and releases her fury. But she’s no monster, she’s just a mother trying to protect her only child.

After the battle with Ultraman and the KDF, Dr. Onda retrieves her body. What he plans to do with it is far worse than anything Ultraman has ever seen.