On his day off, a family situation leads Daisuke to break out of his own mansion. Shortly after he steps out, Kato calls him to help a young boy who is distraught over a lost dog. Daisuke realizes that he left his wallet and gadgets back at the mansion. Unable to resort to his usual tactics, they have difficulty finding the lost dog. Daisuke doesn’t want to go home, so Kato reluctantly invites him into his apartment.

Even after those people were murdered, Daisuke claims that this incident is an internal problem of the Kambe family. The rift between Daisuke and Kato has become so serious that they decide to go their separate ways. However, Kato is apprehended by the First Investigation Division as a material witness. The remaining members of the Modern Crime Prevention Task Force follow the clues about the suspect that Cho-san left behind. Suzue claims to have seen the actual suspect inside the Kambe residence, and clearly states that it was none other than Shigemaru Kambe.