Dr. Paul Kersey (Bruce Willis) works as a surgeon in the emergency department of a hospital in Chicago. Every day he sees the consequences of violence on the streets at close range, but so far he has done little or anything against it. This changes only when his wife Lucy (Elisabeth Shue) and his daughter Jordan (Camila Morrone) are victims of a street gang. With no progress being made by the police in the investigation into the robbery that killed Lucy and severely injured Jordan, Paul takes the law into his own hands and mercilessly shoots one criminal after another during his nightly raids. Soon videos of his actions spread on the Internet and the media take up the topic. The avenging angel is celebrated in the net as a hero. That’s a thorn in the side of the police and especially Detective Rains (Dean Norris).