After divorce and the death of her two children, Mitch is headed for Oaxaca with her brother Sam, a photographer. During their one-day layover in Mexico City, Sam goes out for a night on the town and doesn't return. Mitch goes for help to the American embassy and starts her own search with the aid of Pedro, a cabbie. She finds the cantina where Sam was drinking and stands up to a gang leader to learn some of what happened that night. He gives her Sam's camera, and the photos on the last roll of film become the object of a hunt by some very determined criminals. Can Mitch find Sam, learn what he saw that night, and stay safe? Whom can she trust?