Yan Zhuo, the madman of the Yin Dynasty, used regrets as a contract to extend his life. Every time he regretted an old case, he would live one more day, but he had to devour the souls of others as a inducement. Until he met Yu Gui, who had a strange bond - a living sacrifice who could swallow resentment and reverse life and death. The two were supposed to be hunters and prey, but the old wounds in each other's souls were torn open by layers of blood curses. Yan Zhuo's life book is full of sins, and Yu Gui's life line is entangled in the whispers of hundreds of ghosts. When the Yin official's regret collides with the obsession of the monster, the rules of the three realms begin to collapse: he wants to borrow her to extend his life, but she wants to use his soul to exchange for an afterlife that never exists.
