"When will you return?" tells the story of a grandmother (Doña Conchita) who is taking care of her grandson (Tomás) after her son (José) went to the United States in search of the American dream. However, José is part of the group of migrants who disappeared and were never heard from again. That is why Doña Conchita tries to hide the truth from Tomás, who still has hope of being able to see his father again. It is a story full of memories and emotions, which takes us to one of the most remote and beautiful unknown places of Mexico.