A tsunami submerges the land, making fresh water the most valuable resource in a post-apocalyptic ocean world. After Zhao Wu steals his water purifier and kicks him into the sea, Chen Mo unexpectedly activates an infrastructure-building system. Starting with nothing but a broken raft, he rescues Lu Xiaohao and reunites with the long-lost Aqiang. Trading purified water for materials and using rules to unite survivors, they battle the Mad Shark faction through salvage missions, construction, and naval warfare. In the end, they upgrade their refuge into a mobile city-state capable of carrying 1,200 people—the “Mo God”—and sail toward the unknown waters of the far north.