In a world where emotions can be harvested and exchanged, you awaken as an amnesiac floating between a neurotic supportive community of heart merchants and a dark influx of emotional thieves. As one of the last 'Heartless'—people without emotions—you must navigate the complexities of feelings that are foreign to you. Players will interact with colorful characters whose hearts you've stolen (or borrowed), engage in dialogue choices that determine your emotional evolution, and solve riddles that explore the meaning of love, joy, grief, and anger. Characters will test your resolve as you uncover the sinister plot by emotional thieves to control the city's collective feelings, where you must ultimately choose whether to reclaim your heart or save the city from emotional oblivion.