The dreadful Diva sends her chevaliers to kidnap Riku, Saya's adoptive brother, from the Red Shield's ocean-liner headquarters. New secrets from Saya and Hagi's past lives are revealed, as their present situation gets more complicated. Finding a way to make Saya go berserk and turn into a nearly unstoppable killing machine, Diva intends to pit her against her own friends and those she seeks shelter with.