Natsumi and Miyuki look back on their time at Bokuto Station, hearing again from people they came to know through their police work during the third season. The special closes out that season by revisiting those encounters. The station also gains two new recruits, Kaori Takano and Sakura Fujieda. On their first stretch of duty, Natsumi and Miyuki bring them along on a field trip, and the newcomers soon learn what the job will demand of them as police officers. Action, adventure and comedy mix in this one-episode send-off.