Vampire princess Christina Light is throwing a New Year's Eve party in Daikaiju Plaza a building in the shape of a giant mechanical dragon in Tokyo, attended by world leaders of technology, finance and culture. But the party is crashed by less enlightened souls. The distinguished guests are held hostage by yakuza assassins and Transylvanian mercenaries. And vampire schoolgirl Nezumi sword-wielding agent of the Diogenes Club finds herself alone, pitted against the world's deadliest creatures. Thrown out of the party, she must fight her way back up through a building that seems designed to destroy her in a thousand ways. Can Nezumi survive past midnight?