"For Francisco Cantú the border is in the blood: his mother, a park ranger and daughter of a Mexican immigrant, raised him in the scrublands of the Southwest. Haunted by the landscape of his youth, Cantú joins the Border Patrol. He and his partners are posted to remote regions crisscrossed by drug routes and smuggling corridors, where they learn to track other humans under blistering sun and through frigid nights. They haul in the dead and...

A former agent for the U.S. Border Patrol describes his upbringing as the son of a park ranger and grandson of a Mexican immigrant, who encountered the violence and political rhetoric that overshadows life for both migrants and the police.