Maripì's plans to attend the ballet with her family are spoiled when she discovers that she has chickenpox, accidental getting them from Cuquìn who has them first; Cleo and Cuquìn put on a show at home.
Maripí está emocionada con ir al ballet pero Cuquin le ha pegado la varicela. A Cleo se le ocurre una idea genial: todos jugarán a ser bailarines e interpretarán para ella El Lago de los cisnes.
