Vampires. They are tamed, used as slaves in the houses of the rich. The horrible monsters have been caught. When one family sends their son to get one on the market they get scared when he gets back with one of the infamous Nightwalkers. The most horrible vampires of them all. Everybody knows their names. Lenari and Alucard. The most cruel, horrible and untameable of them all. They are the Nightwalkers.