Forget everything you know about vampires. They defy common myths, able to walk under the sun and remain unharmed by holy water. These creatures seamlessly blend in with humans, even deceiving their own kind. However, once they taste human blood, they unleash their inner beasts, committing atrocious acts without restraint. Not all vampires are malevolent, though. Tokyo's covert vampire surveillance unit includes Yuuki Anzai, a half-human vampire who believes his human side grants him control over his dark instincts. When Yuuki saves college student Tsukasa Taira from a vampire predator, he grapples with unfamiliar desires that threaten to overwhelm him.