Homura Roku was involved in a bizarre murder case. Hatada Tsuruya is found dead in the mansion, and Doi Mitsuko becomes the prime suspect because her handbag is found under the body. However, the medical examiner's identification results were surprising. The cause of death was cardiac paralysis, which brought the case to a deadlock. Through observing the details of the scene, Homura discovered many doubts, such as the death of mice and the secret of empty cans. He gradually suspected that this was a premeditated murder, and the murderer might be Hatada Kamenosuke. As the investigation deepens, more secrets are revealed. Can Homura uncover the truth and find the real murderer?
