In a world where hearts can be traded like commodities, you play as a master heart-forger who has just stolen a legendary, magical heart rumored to grant its owner immense power. However, shortly after claiming your prize, you discover that the heart has a mind of its own and can link to the feelings of the people around you. As you navigate a labyrinthine city filled with eccentric characters, dangerous factions, and shifting loyalties, you must unravel the mystery of the heart's past while wrestling with who really owns your own heart. Choices you make influence not only the fate of the heart but also the emotions and lives of others, leading to multiple endings based on your relationship-building skills and ethical choices.