December 2021, Tokyo district court. Akihiro Ehara stands accused of groping a woman on a crowded train. A bystander’s video footage of his attempt to flee the scene and subsequent apprehension is all over the news, and public outcry demands a maximum sentence.

“Three days ago, a dead body was found in an abandoned building in Yokohama. Have you identified it yet?” he proclaims as confusion cuts through the court room.

His defense lawyer, Saori Shirosaki, has no doubt that crucial details of the situation have been overlooked, as Ehara was not even tried for the murder. She contacts detective Takayuki Yagami to investigate this further.

How could Ehara have committed two crimes at once? Was the sexual battery just a cover up? Has Ehara gamed the entire justice system? As victims surface and Yagami digs farther into the truth, he is faced with a question: Defend the law, or enact justice?

From just a single stumble, one can become a monster…

Ex-lawyer Turned Detective

The former lawyer and private detective Takayuki Yagami returns two years after the resolution of The Mole Serial Killings. Still partnered with former yakuza turned detective Masaharu Kaito, a new case takes him to investigate the bullying occuring at a Yokohama high school, Seiryo High. Meanwhile, his former coworkers from Genda Law Office, defense lawyers Saori Shirosaki and Issei Hoshino have just wrapped up the case of one Akihiro Ehara, found guilty of groping a woman on a crowded train. During the sentencing, he reveals the identity of a body found in an abandoned building in Yokohama: Hiro Mikoshiba, who bullied Ehara’s son to suicide four years ago.

To stay on campus and investigate further, Yagami takes on the role of a club advisor for the school’s Mystery Research Club in hopes of finding connnections to Mikoshiba’s past and to the recent bullying incidents. As the cases begin to converge, a shocking pattern of abuse and deception comes into focus, and Yagami finds himself in a winding conspiracy leading to the most nefarious parts of the Japanese underworld. Between the Yokohama Liumang and a mysterious “handyman” of Yokohama, Jin Kuwana, Yagami is thrust into the fight of his life to see justice prevail. But where can justice be found in a system that turns a blind eye towards its youngest victims?