In 2023, the "Human Purge Program" promoted by the new US government ushered in its sixth year. The extreme policy of taking a radical approach is aimed at curbing the rising unemployment and crime rates. During this period, more and more innocent people have been killed, while the rich have poured their glasses of wine, enjoyed and even participated in the annual massacre carnival with a seemingly noble and elegant attitude. As the massacre was about to begin, the car of Shane (Zach Gilford) and Liz (Kiele Sanchez), a couple facing a breakup, broke down on the road, and they panicked and looked for a place to hide. Eva (Carmen Ejogo) and her daughter Carly (Zoë Soul), who had just lost their most important relatives, were hiding at home and were inevitably doomed. At the critical moment, the mother and daughter were rescued by the sergeant (Frank Grillo) who was patrolling the alleys of the city. At the same time, Shane and Liz also got on the sergeant's car by mistake. New and old hatreds, as well as various resentments and dissatisfactions towards the world, burst out on this night, and fragile lives face the most tragic test...