In a world where emotions take physical form, players assume the role of Alex, a heart-smuggler who has the rare ability to exchange emotions for skills. When a mysterious organization starts stealing hearts to control the emotional landscape of society, Alex must navigate a web of deception, betrayal, and unexpected alliances. Players interact with various characters, each embodying different emotions, and must make choices that will ultimately alter their own emotional makeup. Will they regain their own heart amidst the chaos or become a puppet in someone else's game?