Gritty British thriller starring Michael Caine. Harry Brown (Caine) is a widowed ex-serviceman living a quiet, modest life on a London housing estate. When his only friend Leonard (David Bradley) is brutally murdered by a gang of thugs on the estate, Harry becomes intent on avenging his death, and resorts to his own brand of vigilante-style justice in an increasingly lawless neighbourhood that has become overrun with gangs, guns and drugs. However, his attempts to clean up the estate inevitably bring him into conflict with the police, led by investigating officer DCI Frampton (Emily Mortimer) and Sergeant Hickock (Charlie Creed-Miles).