Cultivators strive for Xian, the ultimate state of being that promises immortality. However, the demonic path, Mo Dao, lurks beneath the surface. Wei Wuxian, one such cultivator, experiments with the forbidden Mo Dao, gaining immense power but causing chaos and destruction, leading to his defeat at the hands of fellow cultivation clans. Thirteen years later, Wei Wuxian is reborn as a lunatic, reuniting with former classmate Lan Wangji and setting off supernatural events that endanger their society's foundation. Mo Dao Zu Shi follows their journey as they navigate the spiritual world's mysteries, battling demons, ghosts, and even other cultivators. Through it all, they unexpectedly form an unbreakable bond.