After Joker defends a woman from being abused by a drunken man on the street, he is falsely charged with assault and put on probation, resulting in expulsion from his school. Joker is sent to Tokyo to stay with his family friend Sojiro Sakura and attend Shujin Academy during his year-long probation. After his arrival, he is drawn into the Velvet Room, where Igor warns him that he must "rehabilitate" to avoid forthcoming ruin, and grants him access to a supernatural mobile app that leads Joker into the Metaverse and the Palace of the school's abusive volleyball coach Suguru Kamoshida. Joker meets Morgana, who informs him of the ability to change wicked people's hearts by stealing their "Treasure", the emotional root of their behavior, from the Palaces ruled by their Shadow selves. After successfully reforming Kamoshida, Ryuji, Joker, Ann, and Morgana form the Phantom Thieves of Hearts, stealing corruption from the hearts of adults to reform the city.
