The group returns to the Planeptune Basilicom to explain the situation to Histoire and the other oracles. Suddenly IF, Kei, Chika, and Mina all receive calls indicating that a member of the Four Felons is present in each nation. The Four Felons demand that everyone in Gamindustri worships Arfoire within ten days and if even one person refuses they will be killed. Mina remembers an old record of a war between a Planeptune CPU named Caelus and the Deity of Sin. While her body may no longer remain, Noire says that her soul may still be around. With idea to ask Caelus for help, the party begins to search Planeptune which takes them to LAN Castle Secret Hall.