在这部真夜中的侦探动画/动作/奇幻片中,真夜中之侦探，讲述的还是关于吸血鬼这个永恒的话题：在百鬼夜行的东京，只有身为吸血鬼的紫藤可以与之对抗。成立侦探社，以侦探之名掩饰身份，与人类共存的紫藤，在同伴布利德出现之后，不堪的往事被慢慢重提……
紫藤：已活了300年的吸血鬼，开了一家侦探事务所，为保护人类而与夜灵作战。
理保：家人为夜灵所害，在紫藤的侦探事务所打工的少女。
弥生：美丽精干的nos警员，并提供紫藤的食物（血）。
咕哩：一直跟随着紫藤的有着一对翅膀的绿色的小妖精、
夜灵：一种夜间出来的恶魔，种类很多，为了得到光明，千方百计想要获得人类的身体。
http://ja.wikipedia.org/wiki/Night_Walker_-%E7%9C%9F%E5%A4%9C%E4%B8%AD%E3%81%AE%E6%8E%A2%E5%81%B5-
Mankind is threatened by a race of creatures called the Nightbreed, people who have, either willingly or through deception, succumbed to supernatural beings. And hunting them down is a man named Shido. A detective. A warrior. A vampire. And with the help of an urban spirit, his naive secretary, and a police agent assigned to special cases, Shido stands as a vanguard against the Nightbreed. But he has his own difficulties as well. Including his sire, the mysterious Kain, and his prophecies of the Golden Dawn...
这玩意简直是坑爹啊——看《真夜中的侦探》吐槽。
