This movie is a prequel picture the beginning of the first one-year “purging”. To force the offense rate below one percentage for the remainder of the twelvemonth, the New initiation father of United States prove a sociological theory that vent aggression for one nighttime in one stray community. But when the force of oppressor meet the fury of the others, the contagious disease will detonate from the trial-city boundary line and spreading across the state.