テセウスの船 E9: Shin follows Bungo, who was called by the killer, and finds Mikio in critical condition and left unconscious in a police car. Inspector Mabuchi visits the Sano home in search of Bungo, who is missing and wanted on suspicion of murder. Bungo's whereabouts remain unknown, and reporters arrive at the Sano home, accusing the police of involvement in the murders. Even though the Otousu incident has been prevented, his father is still accused of murder, and Shin realizes the killer is obsessed with pinning the murders on Bungo. Then, a mysterious message that appears to be the origin of the grudge against Bungo arrives. Backed into a corner, Kazuko gathers the reporters and tells them something. The criminal's shocking strategy is finally revealed.