Milagros Posada is the deputy sheriff of a county near the Mexican border. It is not a job that comes with much respect.
When the body of a dead Mexican teenager is found on the Fourth of July, Mili's boss, the elderly sheriff, responds that the "stiff'll keep till Monday." Mili doesn't accept that and goes out to the scene. "I'm just hiking," she unconvincingly tells the Border Patrol man who finds her there.
There's no crime here except illegal border crossing and human smuggling. The kid died of natural causes.
But Mili is determined to learn his identity and get the news back to his family. Nobody else seems interested in the job. It turns out Mili has tragedy in her past and is willing to use that as a tool to get information.
This is a quiet and moving story.