The Phantom Thieves' early success at bringing those responsible for heinous wrongdoing to justice has brought them to the attention of Medjed, a notorious group of international hackers who threatens to expose their identities. In light of this, the group is also contacted by the enigmatic Alibaba, a rival hacker who offers them a deal - use their otherworldly abilities to change the heart of a girl named Futaba Sakura, and in return they will deal with the problems posed by Medjed.