One day, billions of people around the world are forcibly transported to an endless, pitch-black sea.
From the start, each person has only a shabby little raft on the verge of falling apart. A multifunction survival watch appears on their wrist, allowing them to chat and trade, form teams and make friends, and check warnings about natural disasters and monstrous beasts.
Pei Feng and his younger sister, Pei Xue, are stranded in this desperate place. The boundless black sea hides unknown sea monsters, towering waves can strike at any moment, supplies are scarce, and people are hard to trust.
Some break down and wail in despair; others fight over supplies and kill one another. Only Pei Feng remains calm, salvaging resources, upgrading his raft, and avoiding danger.
He must hold on to his raft and protect the family he loves. In this apocalyptic battle for survival across the sea, he explores the unknown step by step, traverses mysterious waters, uncovers the truth behind the world’s transformation, and survives against all odds with his sister, rising to the top of the deep sea!