Doomsday survivor Su Nian accidentally travels through time into a deep-sea survival game, starting out with only a broken raft. She accidentally triggers the special NPC River God: as long as she throws items into the sea, she can exchange them for gold, silver, and rare material supplies. Using the rules, Su Nian frantically collects resources, subdues a loyal puppet, meets weapon expert Lin Wei, fights against pirate leaders and giant sea beasts, and builds an ocean ark to shelter countless survivors. Having endured multiple crises including storms, seabed rebellions, and meteorite natural disasters, and gathering magic-energy equipment, she finally starts a brand-new journey into the universe, with the River God following and accompanying her all the way.