This story will be the first legal entertainment drama with the theme of criminal lawyer in this series. The figure titled "99.9" refers to the conviction rate of criminal cases in Japan (conviction rate after prosecution). In Japan, because the procuratorate will only prosecute cases that are truly guilty, once the suspect is prosecuted, there is a 99.9% chance of conviction. This figure shows that the Japanese judicial system has gained considerable trust. However, there is a huge loophole behind this, that is, prosecutors often ignore the investigation of the truth of the incident, and there are very few lawyers specializing in criminal cases in society, which makes it extremely difficult to strictly examine the evidence. However, although 99.9% of the incidents were confirmed guilty, it is difficult to determine 0. 1%, which may hide the true "facts". This series is a story that ends in less than 0. 1% and never gives up the pursuit of truth.
This is the first time that Matsumoto Jun has appeared in Riyao Theater. Smile appeared in TBS series again seven years after it was published in April 2009. This time he will challenge the role of lawyer. The deep mountain Daxiang he plays is a poor lawyer who doesn't play cards according to common sense, fights for the possibility of the last 0. 1% and pursues the truth. One day, he was hired by Haruhiko Banmu (played by Ittoku Kishibe), the director of Banmu Law Firm, one of the four largest Japanese law firms, and joined the criminal case team of Banmu Law Firm.