An expedition that has been searching for the golden continent of Atlantis in Sheld in the Sahara Desert finally arrives at Atlantis. There, by chance, a man obtains a golden beetle, which is the control device of the guardian god Thunder the Great , and uses the great king to commit evil deeds.

Shingo , the only survivor of Atlantis, and Stenger, a soldier, try to get the Great King back, but due to a mistake, the Great King flies to Japan. Stenger is ordered by General Jupic to capture King Thunder and travels to Japan with Shingo.

However, even though the Great King was recovered, all kinds of people were targeting the Great King Thunder. Stenger finally couldn't bear it anymore and told Shingo about his mission, and Shingo began to tell him the terrible secret of King Thunder...