This drama is adapted from Keigo Higashino's novel of the same name. It tells the story of Shigeki Nagamine (played by Yutaka Takenouchi), a father who is dependent on his daughter. After his daughter was brutally murdered, he became a murderer in revenge.Shigeki Nagamine has been raising his daughter Ema alone since the death of his wife. In the blink of an eye, his daughter is already in high school.One night, Emo didn't come home after going to work.When Changfeng saw his daughter again, she was already a cold corpse with traces of abuse on her body.A few days later, Changfeng received a mysterious phone call, telling him the name and address of the murderer who hurt his daughter.After much hesitation, he decided to go find it.After sneaking into the family's house, he discovered a video recording his daughter being brutally tortured to death.At this time, one of the murderers happened to go home, and Changfeng killed him in a rage.Then began revenge against another murderer.His daughter's two killers will not face the death penalty because they are minors.As a father, is Shigeki Nagamine's act of avenging his daughter right or wrong?