Based on the manga by Satosumi Takaguchi, adapted by Midori Kogane and Hidehiro Ito, and directed by Rokuro Mochizuki, this anti-hero story follows a fallen boxer turned extortionist. Takasu Goro, once forced out of boxing by a fixed match, now runs a front as a private detective while blackmailing targets ranging from students to yakuza bosses. Feared for his ruthless methods, he’s known as “the dirty one”. His intellectually disabled sister Keiko befriends a man named Osho at her favorite riverside spot. When a yakuza executive is killed, Goro tries to extort the boss for 100 million yen—triggering Keiko’s kidnapping.

A man's life is altered when he comes into possession of a gun.

A talented but troubled Edo Period swordsman, Kanemi Sanzaemon. Three years earlier, Kanemi killed a woman, Renko, the corrupt mistress of the powerful daimyo Tabu Ukyou. Unexpectedly, Kanemi received a lenient sentence for his crime and is allowed to return to his clan after only one year of imprisonment. Following his return, Kanemi is faced with the death of his wife, Mutsue. Thereafter, Kanemi lives with and cares for his wife's niece, Satoo, who has secret affections for Kanemi and expresses them by helping change his bleak outlook on life. Meanwhile, Kanemi's develops his unique "bird-catching" sword technique which he will soon put to test in battle for the first time against the fearsome swordsman, Hayatonosho Obiya.