Seventeen-year-old Juana Perez gets pregnant by artificial insemination due to hospital error. The father of the baby is found to be Mauricio de la Vega. When Mauricio finds out that he's going to have a baby, he starts to fall in love with Juana despite the fact that he is still married to Carlota Vivas. Carlota tries everything possible to keep Mauricio and Juana separated.
Francisco Rojas disappears during Positivo magazine's party. Rogelio Vivas tries to make people think Mauricio has something to do with the disappearing. Mauricio and Juana escape to the mountains but Rogelio and Carlota start looking for them and finally find Mauricio and Juana with a new-born child.
Un cambio repentino del destino destrozará el mundo de Juana, provocando que esta joven de diecisiete años se sienta asustada y aturdida. Los avances médicos en inseminación artificial se combinan con el error humano para dar inicio a la vida de un bebé, equivocadamente, en el cuerpo de Juana.