Although he was a yakuza with the nickname of mad dog, Tsutomu Ibu (Kei Tanaka) became a judicial scrivener after he left the world of the gangster. Although he was living a calm life with his older sister's daughter Karin (Miki Iwasaki), her assistant, Sugiyama (Mori Kanna)'s parents' home, was illegitimate because Karin's kindergarten dad's friend faced the risk of unfair dismissal. Find out that he is forced to leave due to a bad deal. Efforts to save them with weapons of law, humanity, and law. However, he is struggling with the clever strategy that the lawyer Kiriura (Koji Yamamoto) and his father, Tsutomu Ibu (Naoto Takenaka), appear before that.