After one of their friends commits suicide, strange things begin happening to a group of young Tokyo residents. One of them sees visions of his dead friend in the shadows on the wall, while another’s computer keeps showing strange, ghostly images. Is their friend trying to contact them from beyond the grave, or is there something much more sinister going on?

Graduating at the top of her class, elite detective candidate Jun Shibata is transferred to the section that handles cases deemed “unsolvable” by the department. Her partner, though a well-respected and experienced detective, has grown complacent after unsuccesfully pursuing these cases that many consider an exercise in futility. With her upper class breeding, her colleagues don’t expect much from her either, but she suprises them all with her motivation and astounding powers of deduction. Well-constructed mysteries and colorful characters abound in this stylish and edgy police drama.

On the surface, Saya is a stunning 16-year-old, but that youthful exterior hides the tormented soul of a 400-year-old “halfling.” Born to a human father and a vampire mother, she has for centuries been a loner obsessed with using her samurai skills to rid the world of vampires, all the while knowing that she herself can survive only on blood like those she hunts.