“You understand, don’t you? If it comes to this, I’ll have no choice but to kill.” The great detective Suguro Takeru (Nomura Mansai) picks up these disturbing words that are unbefitting for his location – a hotel along the Kumano pilgrimage route in Wakayama Prefecture that he is visiting for a vacation. At this time, things are already in motion. The next morning, when Suguro heads to the hotel lounge to have breakfast, he sees the doctor Sara Kinuko (Higa Manami) reading a medical book there and greets her. Sara knows about Suguro through the newspapers and the two of them have a friendly chat. Then Madam Hondo (Matsuzaka Keiko), her second son Mondo (Ichihara Hayato), eldest daughter Kyoko (Hotta Mayu) and second daughter Junna (Hara Nanoka) arrive at the hotel. She exudes a somewhat peculiar aura as she shouts at the hotel staff and starts issuing all sorts of orders to her children. Her eldest son Reiichiro (Yamamoto Koji) and his wife Nagiko (Sylvia Grab) arrive later.

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