Tang Feiyu, who just lost his job, is called by the female landlady in the middle of the night to fix a water pipe when global seawater suddenly backflows, plunging 8.3 billion people into an oceanic doomsday. He and the 28-year-old female landlady are trapped on a three-meter small wooden raft with scarce supplies. In the desperate situation, Tang Feiyu awakens the SSS-grade talent Harvest, where trades can trigger a hundredfold amplification, and ordinary supplies can turn into divine equipment. The two upgrade the fishing boat, set up defenses, and fight the giant octopus. The tenant and the landlady go from probing each other to falling in love, survive amidst the roaring waves, and embark together on a long journey to find the landlady's daughter.