In this cyberpunk metropolis known as the “Emotional Black Market,” intense human emotions can be extracted and condensed into glittering “emotional crystals,” which are sold as costly luxuries or illegal goods. Joy is currency; despair is a deadly poison. Lin Ke, a top “emotion hunter,” infiltrates the city’s darkest underground market to save his sister, whose life is in danger because of a “Despair Crystal.” He is determined to hunt down a legendary “Absolute Hope.”