Tao Yang and Lu Jiayuan grew up together and shared an unbreakable bond. After Tao Yang's unexpected death, Lu Jiayuan is devastated by the successive losses of her best friend and parents. Then her husband betrays her, and even her own child despises her. Unable to bear any more suffering, she finally considers taking her own life. Determined to save Lu Jiayuan, Tao Yang makes a deal with the King of Hell and returns to the mortal world. Armed with spoilers from on-screen comments, she helps Lu Jiayuan expose and punish the villains one by one, ultimately guiding her out of despair.