Year 2025, two years after the decision of the former police sergeant Barnes (Frank Grillo) not to kill the man who killed his son with the sergeant became head of security for senator Charlene Roan. Senator Roan is the main candidate for the next presidential election because of the promise to cancel the Purge, which is a possibility once a year with impunity commit all the crimes and legalized murder. This controversial act was originally to reduce the alarming crime rates. Senator thanks to the Cleansing of the lost 15 years ago my whole family and as well as Barnes sees no way the style of "an eye for an eye" for the right. But thanks to the people who are not interested end the Cleansing with Barnes and senator Roan find themselves in a night of Cleansing on the street, meet the uncontrolled hordes of bloodthirsty thugs. Survive and can push through the dead end of justice?