Ga Yu (Zhang Lei) was originally a policeman. In order to investigate the hunting of Tibetan antelopes, he pretended to be a reporter and came to Hoh Xil with the inspection team, where the climate is cold, the air is thin, and the oxygen content is extremely low. In this "forbidden zone" for human survival, Ga Yu witnessed scenes of human greed and violent conflicts between humans and the environment. First, the patrol members of the Tibetan antelope protection station were shot and killed by poachers. Then they saw a tragic scene: the poachers fled, leaving behind only many Tibetan antelopes with only jagged bones. The patrol members hunted down the murderer in a harsh environment, and finally only recovered a part of the Tibetan antelope fur. On the one hand, they have to fight against the harsh natural environment, and on the other hand, they have to deal with the brutal poachers. The patrol members and Ga Yu are facing a life-and-death test.