Manami suddenly encounters mass murder at a pub on her 22nd birthday as she is hunted down by two warring vampire clans, the Draculas and the Corvins. Manami is a child of prophecy who is meant to help the Draculas overcome their Corvin enemies who have driven them underground. Meanwhile, droves of young men and women are gathered at the Hotel Requiem by a Corvin named Yamada who informs them that the world is about to end, with this hotel being the only refuge.