Hasegawa plays the lead character Kosaka Shinichiro who is a capable detective in Metropolitan Police Department's (MPD) 1st section. Despite so, as he did not pass the advanced level civil servant examination, Kosaka is still viewed to be a strong contender for the position of section chief. However, his career prospects suffer a huge setback when he makes a mistake during an interrogation and gets transferred to a local police station. While investigating relatively smaller cases, Kosaka meets a group of colleagues who still persist in upholding justice through their own ways even if the cases they handle may seem insignificant.
Okada Masaki plays Yamada Haruhiko, a detective in MPD who graduated from the prestigious University of Tokyo and aims to become a section chief so as to have the power to investigate an unresolved case. Although Yamada had been Kosaka's subordinate all the while, with Kosaka's transfer to the local police station, the two of them clash with each other at work. Yasuda Ken plays the role of Watanabe Hisashi who plays Kosaka's new colleague and is in charge of showing him the ropes. Shunputei Shota will play Kosaka's former boss Mikasa Yohei who treated him very well. Other co-stars include Suruga Taro, Tezuka Tooru and Kiba Katsumi.
In this drama based on an original script, it will describe how the internal conflicts within the police force lead to obstructions in investigations and expose the problems in the organisation. Although the drama is a detective story, he hopes that viewers will not have any presumptions before watching it and that it will leave an impression on them. He is also eagerly anticipating how the collaboration between the staff and cast members of various backgrounds will bring about sparks in this drama. As for Okada who is appearing in a TBS drama for the first time, he described his character as someone who is so eager to climb up the ranks and would not hesitate to kick away anyone who stands in his path. Being calm and a man of few words, he hopes to be able to show these traits of his character through his acting even though he has never taken on a character like this before. He is also excited about the clash scenes between Hasegawa's and his characters in this drama.
As for the actors to play Onoda Yoshinobu, the section chief who has a huge impact on Kosaka's career as a police detective and the heroine Mishima Yuri who is a newbie detective, this will be announced at a later date.
Sources: Sponichi / Sanspo / Oricon