In the fourth season (2021), the interrogation team in the main story line was unexpectedly disbanded, and everyone was assigned to new positions and embarked on different paths.Against this background, the fifth season will continue the 2022 New Year special drama, and the interrogation team finally ushered in the long-awaited reorganization.

Led by Yukiko Makabe (played by Yuki Amami), the interrogation team including the administrator Kajiyama Seki (played by Tetsuji Tanaka), Matsuo Tamagaki (played by Takemasa Tsukaji), Susumu Hishimoto (played by Yukimoto), Haruo Koishikawa (played by Fumiyo Kohinata) will face the strongest suspect in the history of the series.