On an early morning, two dead bodies are found at a house. One deceased person is a senior citizen and the other deceased person is their caregiver. Munenori Shiba (Kenichi Matsuyama) works for the same home health care agency that the deceased caregiver worked. Munenori Shiba is known as a kind and devoted caregiver. Yet, the police begin to target him as a suspect. While investigating the case, Prosecutor Hidemi Otomo (Masami Nagasawa) learns that the home health care agency has an unusually high mortality rate. To uncover the truth, Hidemi Otomo confronts Munenori Shiba.
—AsianWiki