One early morning, two bodies were discovered inside a house. One of the deceased was an elderly individual, while the other was their caregiver. Shiba Munenori, who happened to work at the same home care agency as the caregiver, was well-regarded for his gentle demeanor and unwavering dedication to his patients. However, the police began to suspect him as a potential perpetrator. During the investigation, prosecutor Hideomi Otomo noticed an unusually high mortality rate within the home care agency. Determined to uncover the truth, Hideomi decided to confront Shiba directly.