This is the story "Mariana Cantú" and "Silvana del Valle Ontiveros", the twins in question. Silvana is taken away from her mother, Rocio, and sister at birth. by Gerardo Ontiveros, who paid the doctor that helped Rocio give birth for one of the twins; as his own sister, Regina, needed an infant to pose as her own daughter with her husband Rolando, who Silvana grows up believing is her biological father, as she cannot have children herself in order to keep him and his money at her side. After 12 years, the twins meet again. They see the resemblance between them, and Silvana asks Mariana to switch places with her for a day so that she can audition as Silvana and get a part in a famous upcoming children's band called Cómplices al Rescate, as Mariana can sing well and Silvana cannot sing at all.