Class struggle and violence among residents in an isolated high-rise apartment. This high-end apartment has a total of 40 floors and has more than 2000 separate suites. supermarkets, swimming pools, primary schools and other living facilities are available, and each floor is connected by a high-speed elevator to form a small society completely independent of the outside world. But this seemingly perfect world is so fragile that a small power outage and petty neighborhood disputes can lead to conflict, and as the conflict escalates, the people in the building are also divided into three camps: the lower class living on the ground floor, the middle class living in the middle, and the rich class sitting in high-rise luxury apartments. Residents of different camps began to fight each other for limited public resources, where the rules of the civilized world no longer apply and have been replaced by the law of the jungle.