'Okura' members such as Senju Tobi (Takashi Sorimachi) and Katsuki Fuwa (Haruka Sugino) learn that the head of the First Investigation Section, Hideo Kasaki (Shunsuke Nakamura), was killed by someone.

Jiashi was standing on a ruins of the dock at the time, and it is said that he was directly hit by the explosives set there.The explosives were electronically controlled and mobile phones were used as remote detonation devices.This method is very similar to the continuous bombing incident in which Yuki Renko (Shiraishi Mai)'s father Shinichi (Hirayama Yusuke) was killed ten years ago.

Qianju and Riji speculated that it was the same criminal. All members of 'Okura' were dispatched to investigate, but as expected, no clues were found.It’s time to get off work, and Kiri Makihara (Sayaka Aoki), Manabu Oto (Jun Hashimoto) and others are starting to prepare to go home.On the other hand, Renzi asked Qianju to learn more about the murder of his father.‘Why was my father killed 10 years ago?’ Facing Renzi’s question, Qianju began to tell what happened in 2014..."