Description Nereida, Ondina's sister and Mia's aunt, invites them to spend a few days in Mallorca. There lives her family and Mia's cousin, Aina. She lives in an apparently abandoned castle, but nothing is what it seems. Of course, a builder intends to turn the castle into a luxury hotel. Aina's father has told him a thousand times no. So they invite her to dinner and the Fantasia will make her spend a scary night to make her forget about them. Playing ghosts will be a lot of fun!