A VIP from overseas who was scheduled to enter Japan suddenly disappeared. Members of Mihama Gakuen SORD begin to support the search for disappearances. Cooperation and feud with twin sisters enrolled in Mihama's sister school "Kyosen Sakuragaoka". Rumors of a mysterious female rider "Soul Speed". The chase eventually becomes a fierce battle, and the mind and body are torn apart. It was also a journey back into the past, dating back to the encounter between Lena and Hart.