Fang Yuan, a ruthless demon-path cultivator, is betrayed and killed after centuries of scheming, then wakes up 500 years in the past in his younger body. Armed with his memories of the future and a lifetime of cunning, he sets out to claim the Spring Autumn Cicada, a legendary Gu worm that lets its owner relive the past, and to pursue eternal life by any means necessary. In a world where cultivation depends on raising and refining Gu worms, Fang Yuan trusts no one and sacrifices anything, and everyone, to climb the ranks.