At noon one day, the sun disappeared, the sea retreated to the poles, and the end came. The male protagonist is taken in by the Baitian Cult and prepares to explore the ancient city under the sea. He was attacked by ancient civilization machines in the ancient city and was beaten to pieces. The hero, heroine and other doctors, a total of five people, embarked on an adventure. Pyramids were discovered at the bottom of the sea, giants' "Heavenly Palaces" (spaceships) were discovered inside the pyramids, and they escaped from the spaceship to discover the legendary underworld. They experienced the Forgotten River, the Gate of Hell, and the Road to the Underworld. Enter the interior of the earth through Wangxiang Pavilion and discover a new world. Discover many deformed ancient creatures in the inner world...