Natsuki Amakusa (Masuda Takahisa), an overconfident genius detective with extraordinary deduction skills, meets Yuya Shiki (Ukisho Hidaka), a cool high school student who guessed the culprit at the scene of a suspected suicide. Yuuya possesses a special talent that allows him to see the shadows of murderers.
Shohei Kazama (Kinya Kitaoji), who travels all over the country and works as a special police chief, is new to the Iwaki Tokiwa Police Station in Fukushima Prefecture. Kenichi Nishino (Yuma Nakayama) and Kanji Takizaki (Hiroki Okada), the head of the criminal division, express their repulsion. Dai Kuramochi (Hiroshi Katsuno), an alumnus of the Fukushima Prefectural Police, tries to calm him down, but for some reason he continues to show hostility. At that time, Hisashi Ono's (Ichiro Ogura) body is found.
189 is a phone number to call when a child needs to be saved from an abusive situation. Children and adults can call that number, where they will be connected with the nearest child consultation center. Taiga Sakamoto works as a rookie child welfare officer. A girl that he worked with is being sent back to her mother. The girl was abused by her mother and stayed at a shelter. The next day, she loses her life. Taiga thinks about quitting his job. At this time, he receives a phone call from the hospital. A doctor calls him and tells him that a six-year-old girl's wounds looks as if they were caused by physical abuse. The abuser is assumed to be her father, but the girl's father denies any wrongdoing. Taiga and Attorney Shion Akiba try to prove that the girl was abused by her father.
Yuma Nakayama is a Japanese idol and actor born in Osaka, Japan. He started his career as an idol after passing the auditions of being a Kansai Johnnys Jr. in 2006. In 2008, he debuted as an actor taking the lead role of Takumi Harada in NHK drama Battery.