Synopsis：In the late autumn of 2004, on the northwestern grasslands, men posing as traffic police stop a copper mine security transport truck. Explosives blow open the cargo crate, two lives are lost, and the armed gang flees with their guns into the vast Gobi desert. Detective 杨志刚 uses footprints and traces at the scene to precisely identify the killer. As the manhunt unfolds, it leads to a herder silenced, an insider at the mine, and a shocking credit cooperative heist. Infighting and retaliatory killings within the desperate gang, along with border human smugglers turning on one another, erupt in a deadly chain. Amid swirling sand and gunfire, the hardened cop stakes his life on a grassland hunt for the killer—every step is a life-or-death gamble.