In a vibrant city where emotions can be physically crafted and traded, you play as a young heartsmith named Riley, who specializes in assembling and repairing hearts made from a magical substance. One day, a mysterious heart arrives at your workshop: it is clearly in distress and carries the emotions of several different owners. To uncover the identity of the heart's owner, you must navigate a web of relationships, secrets, and politics in the heart trade, forging connections with diverse characters while piecing together the truth. Choices you make will affect the hearts you craft and the emotions you elicit, leading to one of multiple dynamic endings.