Set in a world where emotions are tangible and can be transferred between people, you play as a reformed heart-thief turned detective. After waking up to find your heart missing, you must traverse through the bustling Emotion City, questioning a colorful cast of characters—from a cynical Joy, a perpetually angry Rage, to a whimsically sarcastic Sad. Using your unique ability to sense and manipulate emotions, you follow a trail of feelings to uncover secrets, resolve conflicts, and ultimately discover who has taken your heart and why. Every choice impacts not just the narrative path but also the emotional state of the characters around you, leading to multiple possible endings.