The setting: Edo period Japan.
Ichitaro, the young heir of Nagasakiya, one of Nihonbashi’s most prestigious merchant houses, has been frail since birth and rarely allowed outside.
Ever since he was little, he’s been looked after and protected by a group of yōkai—including a hakutaku and an inugami—who serve him faithfully.
One night, Ichitaro sneaks out of the house, slipping past the watchful eyes of his caretakers.
But during his secret outing, he witnesses a murder.
From that night on, a series of bizarre and gruesome killings begins to plague Edo…
With the aid of his loyal yōkai companions, Ichitaro sets out to uncover the truth behind the murders—and track down the killer!