It’s the latter half of the Edo period when cruel thieves feared Heizo Hasegawa, known as “Heizo the Oni". He is the head of Arson Theft Control.He never tolerates injustice and punishes criminals who violate the three articles of a thief.Surrounded by quirky characters, Heizo rids the injustice that infests the city of Edo.

[Source: Crunchyroll]

Pilot version for Onihei OVA.

OVA setting up the character of Heizou, the man feared by thieves and miscreants as the "Demonic Heizou" during the Edo Period. A young man traces the stories about Heizou from Kumehachi, Hikojuu, Omasa, and others who know and admire him. The young man learns about Heizou's early years and how he became a police operative.

[Source: Anime News Network]