Nightwalker: The Midnight Detective complete collection contains episodes 1-12 of the anime directed by Kiyotoshi Sasano and Yutaka Kagawa.

A vampire with no past, on a mission to atone for his sins against humanity, Shido is a private detective with a secret obsession. The Nightbreed - a supernatural race of demons even more sinister than his own kind - have descended on the city, taking possession of human bodies which they use to wreak havoc and murder. With the beautiful and determined government agent Yayoi hot on his tail, and his vampiric elder Cain intent on bringing Shido back into the fold, the undead vigilante races to keep one step ahead and solve the mysteries of the Nightbreed before it's too late.