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.

The impossibility of guide her three daughters in life and the constant failed promise to be a good mother frustrate and imprison Susana more and more. Ana and Clara, her older daughters, decide to release her from her burden.