In a world where emotions are tangible commodities, players take on the role of a heart merchant who specializes in acquiring and selling unique, enchanted hearts. Each heart has its own backstory and emotional power, from the thrilling heart of a brave knight to the wistful heart of a forlorn poet. The player must navigate emotional entanglements, solve mysteries involving the origins of different hearts, and engage in dramatic negotiations with both clients and rivals. Choices made throughout the story will affect the emotional balance of the world, leading to unexpected consequences and alternate endings based on the hearts they choose to align with.