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.
Rookie detective Tatsuya Sumire dreamed of being like the hot-blooded detectives who appear in detective dramas. However, the first order he gets from his superior is to infiltrate a programme as an idol in order to solve cases occurring in the entertainment industry. And so, the idol ‘Deka Dance’ is formed impromptu. Tatsuya is initially bewildered by the special world of the entertainment industry but somehow gets popular each time he solves a case. And then he gradually becomes aware of himself as an idol.
Akira Inami (Shun Oguri) is a former Self-Defense Force member. He was emotionally scarred by a special mission and subsequently discharged from the Self-Defense Force. Now, Akira Inami works for a secret Special Investigation Team at the National Police Agency. Meanwhile, Saburo Tamaru (Hidetoshi Nishijima) is kind and stoic. He used to go on special missions, but due to an incident was ordered to join the Special Investigation Team. With Akira Inami, Saburo Tamaru and other members, the Special Investigation Team tackles important political matters and dirty jobs for the government.
Kinshiro Toyama (Hiroshi Tamaki) is the new chief at Kitamachi police station. He is enthusiastic to solve cases which interests him. He bickers over pretty much everything with veteran detective Yozo Minami (Masahiro Takashima). Minori Aikawa (Miori Takimoto) is a rookie detective who wants to become a veteran detective.
Nagisa Kinomiya (Maki Horikita) is a detective for the 7 Investigation Division. The team consists of female detectives and they seek out female criminals and to help female victims. Nagisa Kinomiya has a special ability to hear the mind's of others. To shutout other people's emotions, she wears a headset, but, when working on a case, she uses her special ability. At crime scenes, Nagisa Kinomiya can hear the left behind voices of criminals and victims.