Yukiko Makabe works at the #3 Special Investigation Team of the Metropolitan Police Department. She has excellent negotiation skills. Yukiko then attempts to negotiate with a hijacker on a bus, but something unexpected happens and her mission fails. Yukiko takes full responsibility and takes a transfer to a special interrogation team "Kintori". Her boss is Katsutoshi Kajiyama and Yukiko has had a difficult working relationship with him in the past. Her other coworkers include Susumu Hishimoto, Zenjiro Nakata and Haruo Koishikawa.

Makabe Yukiko is a detective in the First Investigative Division’s Emergency Investigation Response Team. They are a team of interrogation experts that goes by the name of Kintori. Surrounded by idiosyncratic veteran interrogators (Tanaka Tetsushi, Denden, Osugi Ren, Kohinata Fumiyo), she pursues the truth hidden behind cases as she plays mind and word games with tough criminals.

A few months before a law is enacted that requires the recording of all police interrogations, police officers gather at the Tokyo Metropolitan Police Department and they receive instruction on how to treat suspects better. They observe, Yukiko Makabe from the special interrogation team Kintori interrogate a suspect who does not show any signs of remorse. Yukiko Makabe uses sharp words and shows a lack of respect towards the suspect. Due to her behavior, Councilor Reiko Kikuchi orders Yukiko Makabe to train newcomers. Around this time, Yuta Nomoto, who received a 12 year sentence, escapes while being transferred to prison. He breaks into a house and takes a housewife as a hostage.

The Tokyo Metropolitan Police Department decides to disband the special interrogation team Kintori. The team will be disbanded in 100 days, by September, 2021, but the the members of Kintori still carry out their jobs.