Inushichi is a rogue with a horrible criminal record, including rape and extortion. By chance, he ends up working for the constable Gennosuke Tagami. One day, Inushichi sets out to catch a thief who broke into a lumberyard. However, a shocking conspiracy is swirling behind the incident.

A "wicked" scoundrel who will do anything for money, women, and lust races through the streets of Edo! The shadow of a man silently approaches the side of a woman who is sleeping disheveled. His criminal record is etched on his forehead, and this ultimate ruffian, who has committed womanizing, intimidation, and violence, has by chance become a pawn of a rookie constable. The man's name is Nana, also known as Inu Nana, and he takes on a difficult case. When the rage of this ruthless villain who will do anything explodes, his deadly boomerang attack tears through the darkness.