Yu Xi accidentally stumbles into a mysterious realm hidden within an ancient villa governed by strange and secretive rules. Here, there are rules for making wishes that must be obeyed, and everyone who comes and goes harbors their own motives, creating an oppressive and bizarre atmosphere. Everyone else acts cautiously and follows the rules to the letter, terrified of violating unknown taboos. Only Yu Xi refuses to play by the rules. One casual remark she blurts out startles the realm's master, who has lived alone in the villa for years and is cold and taciturn.