In a world where emotions can be extracted and traded like commodities, you play as a heart dealer—a rogue who specializes in questionable exchanges. After unknowingly receiving a cursed heart during a trade, you must navigate a darkened underbelly of a city engulfed in chaos. Each decision you make either enhances your control over the city's fate or spirals it into deeper madness. Encounter rival dealers, shadowy factions, and scientists obsessed with heart matters as you unravel the mysteries of the heart you hold—and the very essence of humanity itself.