In 2023, the "Human Cleanup Plan" implemented by the new U.S. government will usher in its sixth year. The extreme policy of taking the edge of the sword is aimed at curbing the rising unemployment rate and crime rate. During this period, more and more innocent people are also killed, while the rich are pouring wine in their cups, admiring it with fat hearts and even participating in the annual massacre carnival with a seemingly noble and elegant attitude. As the massacre approaches, couples Shane (Zach Gilford) and Liz (Kiele Sanchez) facing a breakup whose car breaks down on the road and they frantically search for a place to hide. Eva (Carmen Ejogo) and her daughter Carly (Zoë Soul), who have just lost their most important loved ones, are inevitably doomed when they are hiding at home. At the critical moment, they are rescued by a sergeant (Frank Grillo) who is patrolling the streets of the city. At the same time, Shane and Liz also accidentally get into the sergeant's car. New and old hatreds, as well as various resentments and dissatisfaction with the world, broke out on this night, and fragile lives faced the most tragic test...