Marilú es la hermana del medio. Todos sus hermanos tienen muchos atributos pero ella no cree tener  ninguno, así que decide volverse invisible. Es entonces cuando nota cómo progresivamente su familia se vuelve gris sin ella; allí descubre su valor y su papel y toma una divertida decisión.
 
Marilú is the middle sister. All of her siblings have many attributes but she doesn't think she has any, so she decides to become invisible. It is then that she notices how her family progressively turns gray without her; there he discovers his value and his role and makes a funny decision.