Difficult times and persecution in Mexico during the Cristero Rebellion. The life of young Jose Sanchez del Rio, who became a martyr and a saint.

Gaby, Fer's mother and Silvia, Diego's mother, live their lives happily, until one day, due to Diego's kidney disease they find out that the kids were switched at birth. In order to save Diego’, both mothers end up in a legal battle to see who will have the custody of which kid.