In the near future, in the United States, the national unemployment rate is only 1%, the crime rate is the lowest in history, and violence has almost disappeared. The United States of America seems to have entered a beautiful golden age like paradise, and it is an unprecedented sweeping plan that has contributed to this perfect appearance. In order to effectively release the depression and dissatisfaction in the hearts of citizens, the state specifically stipulates that one day every year, after 7 pm, a nationwide sweep of 12 hours will be held, when people will take to the streets and start a fight that does not have to bear legal responsibility. And killing. In this deformed era, security system salesman James Sanding () made a fortune and lived a happy life with his wife and children.
It was the night of another year's sweep, and the Sanding family sat in the imposing luxury mansion, watching the night of killing performance in front of the screen. Unexpectedly, this night, James' son Charlie rescued a tramp who was hunted down, and the Sanding family was inevitably involved in a bloody whirlpool.
