In the apocalyptic age of cultivation, Li Changsheng, the Immortal Great Emperor who suppressed the nine forbidden zones and protected the world for eight thousand years, is nearing the end of his life. A peerless system, eight thousand years late, suddenly awakens and issues missions with lifespan and cultivation techniques as rewards. The system then guides him into the Demon Abyss, where he discovers that his former beloved, Wen Jingyun, has not truly perished. To help him survive the deadly tribulation of becoming an emperor, she sacrificed herself and transformed into the Goddess Flower of the Nether River. Using a Great Emperor Experience Card, Li Changsheng forcibly takes her away and vows to live a second life and seek out the Netherworld King to bring her back to life.