In a world where emotions and hearts can be traded like commodities, players take on the role of a detective named Alex, who has a rare condition—being able to sense the heart’s feelings without any physical manifestations. When a wealthy aristocrat's heart goes missing amid a lavish masquerade ball, it's up to Alex to unravel the tangled web of secrets, betrayals, and hidden identities among the guests. With the help of a quirky heart-shaped AI companion, players will dive into a series of dramatic dialogue trees, revealing each character’s true motives while piecing together clues to recover the stolen heart.