In the 312th year of the Great Yu Kingdom, the Demon Sect's sudden emergence topples the Eastern Bureau and shatters the Lin faction's grip on power. The martial arts world descends into treacherous schemes while the dynasty teeters on collapse—all sparked by a single impossible event: the Demon Sect Saintess's untimely demise. When Chen Yi closes a murder investigation and returns home, he discovers the dead woman alive on his bed, trembling and calling him "Master." His sworn enemy from a past life has become his concubine in this one. The Empress Dowager commanding the imperial court, the pristine Demon Sect Saintess, the world's ninth-ranked one-armed sword master, the detached Taichua Goddess, the righteous Spring and Autumn Sword Master—all were once his mortal enemies, all once yearned for his death. Yet one by one, they surrender, bowing under the weight of shame and acceptance.