Harry Brown lived a long, busy life and was never afraid of death. But the moment came when old age made itself felt, life in the modern world has become different, and death too. Previously, people were killed by a serious illness or war, but now people are killed by drugs, alcohol, general indifference and cruelty. Harry lost all the people he loved most: his daughter, wife and best friend. Brown blames everything on modern society, which has turned the country into hell knows what. Harry has nothing to lose, he decides to take revenge on the modern generation and the world as a whole.