Mitsunobu Hosokawa

One day, Hikojiro goes to visit Sayo Kujo, an old lady who has been hospitalized. Sayo has been told that she has a year to live by assistant professor Natsuhiko Moriwaki, and insists on returning to the house she was born and raised in. It so happens that Hikojiro will be the one to treat her at home from now on. At the university hospital, Hikojiro runs into a familiar face - Hazuki, the daughter of Tetsuji Tonoyama, the man who taught Hikojiro how to make takoyaki. Hazuki is now a nurse at the university hospital and Hikojiro is surprised to see a strange poster on the hospital bulletin board that implies she's having an affair with Moriwaki. The hospital is currently preparing to elect a new chief surgeon, and the candidates are assistant professors Moriwaki and Shinsuke Noguchi, heads of the first and second surgical department. Both of their factions have been publishing defamatory statements about each other.

One day, Hikojiro receives an emergency call from inn proprietress Shino Ogawa to examine Tadahiko Mori, a guest complaining of stomach pain. Mori, who owns an art gallery in Tokyo, has come to Kyoto on a trip with his only daughter, high school student Nanami. Hikojiro gives him his business card, telling him to contact him if the pain comes back. However, the next day, Mori is found dead...!

The members of this elite investigative team are unique individuals with their own personal troubles, but what unites them is their strong sense of justice. They each channel all their energy and skill to solve the most difficult cases.

The #9 investigation team has been disbanded and members of the #9 investigation team have been scattered around. One year later, the Chief of the National Police Agency, Sojiro Kandagawa, orders the creation of a special investigation team to cover from the initial investigation until it is sent to the prosecutor's office. Sojiro Kandagawa appoints Sakutaro Munakata as the leader of the special investigation team. Former #9 investigation team members join the special investigation team.

Kiyoka Kuromi, a housekeeper with a hidden agenda, is determined to create the "ideal family" at any cost. Assigned to the seemingly perfect Haibara family, she quickly bonds with them, but her obsession drives her to take increasingly extreme and unethical actions in her pursuit of perfection.