In a world where emotions can be traded like commodities, players take on the role of a 'Heart Collector,' a rogue detective hunting for stolen emotions after a powerful black market deals in hearts goes awry. Players navigate a dynamic cityscape, interacting with colorful characters, solving puzzles, and piecing together the story behind the mysterious disappearance of the world's emotional balance. As they uncover secrets, players must make choices that affect their emotional state and relationships, leading to multiple endings based on the hearts they choose to collect and the truths they uncover.