A group of Mexican migrants attempt to cross the U.S. border through a remote stretch of desert. Among them are Moises and Adela, hoping for a better life in America. As they navigate the harsh environment, their journey turns perilous when their truck breaks down, and they are forced to proceed on foot. Unbeknownst to them, they are being hunted by Sam, a violent and vengeful vigilante, accompanied by his loyal tracking dog. Sam sees it as his personal duty to patrol the border and eliminate any trespassers with ruthless determination.

As the migrants struggle to survive the blistering heat and treacherous terrain, Sam methodically tracks them down. The group's numbers dwindle as they are picked off one by one. The remaining survivors, including Moises and Adela, must summon every ounce of their courage and resourcefulness to evade Sam's deadly pursuit. The desert becomes a deadly battleground where the line between hunter and hunted blurs, and the fight for life becomes increasingly desperate.