Medialuna, the little princess, has been bewitched by the powerful witch Gualichu and cannot sleep at night. While everyone else in her kingdom sleeps, Medialuna travels into a world of witches, princesses, monsters and fantastic creatures from legends and myths. She shares with them great deeds and reveals tangled mysteries until dawn. In this episode, the gang discovers that Gualichu has captured Princess Yagua. In an effort to help Yagua, Medialuna casts a spell and pretends to be a so she can get close to Gualichu. Medialuna tries to reverse the spell and help Yagua.