Huang Xiaotian is a security guard. After a big fire, he traveled to a vast water world. Human beings are like duckweed floating on the sea without a fixed place, and are attacked by all kinds of giant monsters in the deep sea! There are wolves; shield beasts with invincible defense; treacherous and evil human-faced fish, red skull and fang fish! Even the giant tooth sharks, strange shrimps, mosasaurs, Neptunes, and Deng's fishes in ancient legends have also appeared one after another. Appear! Fortunately, Huang Xiaotian, who came through time, can also transform into a deep-sea giant! Exploring, he discovered that this world is inextricably linked with the earth...