Christopher

Her pupils murdered her daughter. Now she will have her revenge. After calling off her engagement in the wake of a tragic revelation, Yuko Moriguchi had nothing to live for except her only child, four-year-old child, Manami. Now, following an accident on the grounds of the middle school where she teaches, Yuko has given up and tendered her resignation. But first she has one last lecture to deliver.

Detective Kyochiro Kaga of the Tokyo Police Department has just been transferred to a new precinct in the Nihonbashi area of Tokyo. Newly arrived, but with a great deal of experience, Kaga is promptly assigned to the team investigating the murder of a woman. But the more he investigates, the greater number of potential suspects emerges. It isn’t long before it seems nearly all the people living and working in the business district of Nihonbashi have a motive for murder.

Manabu Yukawa, the physicist known as "Detective Galileo," has traveled to Hariguara, a once-popular summer resort town that has fallen on hard times. He is there to speak at a conference on a planned underwater mining operation, which has sharply divided the town. One faction is against the proposed operation, concerned about the environmental impact on the area, known for its pristine waters. The other faction, seeing no future in the town as it is, believes its only hope lies in the development project.

Yasuko Hanaoka is a divorced, single mother who thought she had finally escaped her abusive ex-husband Togashi. When he shows up one day to extort money from her, threatening both her and her teenaged daughter Misato, the situation quickly escalates into violence and Togashi ends up dead on her apartment floor.