Ichitaro, the young master of Nagasakiya, one of the top commercial stores in Japan during the Edo period, was born with a weak constitution that leaves him unable to go out much. He is always surrounded by his spirit companions, including a Hakutaku and an Inugami, who protect him. One night, Ichitaro steps outside and witnesses a murder, and from that day onward, bizarre murder cases keep happening all over Edo. So with the help of the spirits, Ichitaro's hunt for the culprit begins!
