Since the war between Mothra, Pterosaur Raton, the three dragons Kidola and Mosla, the imperial organization has established an observation area on Skeleton Island, and most of the information is also open to the public; By this time, King Kong had grown up. APEX, a new technology company, tried a bold daily task to solve Mosla with materials, but the risk of this daily task was suitable for the crisis.

As we all know, Mosla sensed APEX's ancient behemoth through magnetic force, and gradually launched an attack on people. APEX saw the decision to find the inner world with King Kong to get more electricity.

King Kong and his guardians, who only want to return to the real garden, embarked on a difficult journey.

Together with them, there is a young orphan girl-Jiya, who has a unique and strong close relationship with King Kong.

But what I didn't expect was that they met with the furious Mosla on the advancing river, and the secret hidden in the depths of the earth's core was thus solved.