One day, Tomonaga Takashi, a medical representative of pharmaceutical company Tenei Seiyaku, is suddenly suspected of molesting inside a train by male and female strangers. He has an important appointment and tries to get away. However, Nitta Masato, who rushed over from the police box in front of the train station where he had been on duty, arrests Tomonaga as he fights back. This is Nitta’s first achievement as a new police officer.