In his previous life, Nie Li was too weak to defend his home when it truly mattered, but through sheer determination he became the most powerful Demon Spiritist, reaching the summit of the martial world. He ultimately perished in his battle against the Sage Emperor and six deity-ranked beasts. His soul was then sent back to the time when he was thirteen years old. Now he is the weakest student in his class, possessing the lowest talent—only a meager red soul realm—but armed with the vast knowledge he amassed in his former life, he resolves to train far faster than anyone anticipates. He also decides to help those who died honorably in his previous life, pushing them to train more quickly as well. He is determined to protect the city from its coming fate of being devastated by demon beasts and the eventual destruction that overtook it before. He aims to safeguard his lover, friends, family, and fellow citizens who perished in the beast assault and its aftermath. And he is set on destroying the so-called Sacred family, who arrogantly abandoned their duty and betrayed the city in his past life.