The popular series "99.9 - Criminal Lawyer" starring Jun Matsumoto, which was broadcasted as TV drama in 2016 and 2018, is now available on DVD as a completely new TV special. This is a new kind of legal entertainment in which a criminal case with a conviction rate of 99.9% is challenged with a possibility of 0.1%! At the inauguration party, Shozo Wakatsuki, the chairman of a major automobile manufacturer, asks Sada to raise his granddaughter, a newbie lawyer, at his law firm, and Sada readily agrees. Meanwhile, Hiroto Miyama (Jun Matsumoto) is at the jail with his client, Koji Oshima. Oshima had been arrested and charged with theft of underwear. Oshima denies it, but the circumstantial evidence points to his guilt. Honoka Kono was in charge of the defense of this case, and although she recommended extenuating circumstances, Oshima, who said he never did it, switched his request to Miyama in order to get an acquittal. Miyama immediately goes to Kesennuma based on Oshima's story. For some reason, Honoka decides to go along with him. There, the two are in mortal danger...