An unidentified blue celestial body approaches Earth, triggering torrential rainstorms that sweep across the globe. Within a short time, floods submerge the streets, plunging the entire world underwater. As extraterrestrial creatures invade, humans begin to mutate under various circumstances. The male protagonist, Chen Mo, gains a system and supernatural abilities after devouring an entire extraterrestrial creature. Soon, his apartment building is submerged by floodwaters. Chen Mo leads his roommates, Chen Xiaoxiao, Yingying, Taotao, and others, in escaping the building and heading to Haiqin Bay to find his girlfriend, Qiao Nianchu. After a fierce battle, they manage to temporarily shelter in a rooftop machine room. However, their conflicting values eventually lead Chen Mo and Qiao Nianchu to break up. Chen Mo then leads his companions away from Haiqin Bay once again, heading for Phoenix Mountain...