On December 29, 1997, the Wangan Police Station was extremely busy at the end of the year. Yukino and his friends, who were assigned to the Wangan Police Station on a sunny day under Sumire and directly below, were carrying out their duties while lamenting such busyness. Muroi, who was the first security section chief of the National Police Agency Security Bureau, learns that Qingdao, who had been transferred to the Suginami Kita Police Station after taking responsibility for the scandal in March, has not returned to the Gulf Police Station. Qingdao decided to return to the Wangan Police Station on a sunny day due to Muroi's plan, but Hakamada and other section chiefs refused to take over Qingdao. In addition, Kazuhisa, who retired in March, was forced to become an instructor and returned to the Wangan Police Station. Qingdao is assigned to the traffic department and starts work reluctantly, but he ends up being fooled inside the station by taking the selfish action of plunging his head into an injury case because of his own work. Meanwhile, a murder case occurred within the jurisdiction of the Gulf Police Station. A special investigation headquarters is set up at the Gulf Police Station, and Director Shinshiro is dispatched as a commander from the Investigation Division 1 of the Metropolitan Police Department, which succeeds Muroi. After that, Qingdao, who was pursuing the injury case alone, arrested Kyoichi Kagami, who had been questioned at the Life Safety Division, as the criminal. He is handed over to the Criminal Division and is investigated by Makoto, but the mirror disappears when Makoto leaves his seat. Then, at the next moment, a mirror that points a hunting gun of another evidence to Hakamada who was in the section chief's seat and threatens "Don't move!". What a mirror, Hakamada and others were taken hostage in the Criminal Division and kept in a cage ...