Screenwriter Takashiro Sasaki (Haruko Kato) murders her younger sister Kazuko (Moeko Ezawa) whom she had a long-standing feud, and makes it look like a robbery gone wrong. Furuhata suspects his favorite screenwriter, but they wouldn't have been able to throw away the weapon. To prove her guilt, Furuhata enlists Imaizumi as Sasaki's newest assistant.
