In a world where everyone must survive at sea, Lin Yuan, a gaming expert dismissed as useless, finds himself stranded with his former classmates aboard a dilapidated pirate ship. In seven days, the ship will sink, forcing everyone to land on an island in search of supplies and weapons. Three days later, the island will sink too, and the survivors must return to the ship to evacuate. While on the island, they may face treasure raids from other classes; aboard the ship, they may encounter sea monsters and naval battles. Before crossing into this world, Lin Yuan dropped out of school at an early age due to family troubles and made a living as a professional gaming companion. After arriving, while others awaken A-rank talents, his talent is so powerful that it cannot even be identified, causing everyone to dismiss him as useless once again. Little does anyone expect that on the day they land on the island, he will lead the entire class in a fierce assault into its depths to find a way home.