Detective Suguro is enjoying a stay at a luxurious hotel in Wakayama. Also staying at the hotel is an unusual family led by rich widow Mrs. Hondo. She acts like a tyrant around her children, who are afraid of her and are at her beck and call. Unfortunately, a tragedy strikes the Hondo Family while on a hike to a local shrine. Mrs. Hondo, who was supposed to be taking a rest on the way, is found dead. Kawahara Daisaku, the chief of the local police station, asks Suguro to help with the investigation of Mrs. Hondo’s death.
Unfortunately the movie Promise of death is not yet available on HBO Max.
| Directing | Hidenori Joho | Director |
| Production | Kouya Watanabe | Producer |
| Writing | Koki Mitani | Screenplay |
| Writing | Agatha Christie | Novel |
| Production | Masataka Takamaru | Producer |
