In 1940's Mexico, a meeting between a man and a prostitute leads to an unusual relationship.

There is a serial killer and the detectives try to capture him. Someone brings him women willing to migrate to the United States, he sexually abuses them and kills them.

Magdalena makes a journey to find her son, who has disappeared on his way to the Mexican border with the United States. Her odyssey takes her to meet Miguel, a man recently deported from the US. They start to travel together, Magdalena looking for her son, and Miguel hoping to see his mother again.