The earth sank, all souls were reborn, and humans were forced to evolve into aquatic beings. They no longer need air or land and can always live in the water. However, the ocean is not the Garden of Eden. It is already the home of hundreds of millions of creatures. The emergence of aquatic humans breaks the balance. They have to fight for living space in the shallow seas from small fish and shrimps, to fight with sharks and tuna in the middle sea, to fight for territory with humpback whales and sperm whales, and even face those terrifying behemoths in the deep sea that humans have never seen before. This is a survival battle for human beings returning to the sea. It is a contest between wisdom and instinct, a confrontation between the weak and the powerful, and a life and death game between new species and the old overlord.
