It's Christmas and Zip and Zap are up to their old tricks. But this time they've gone too far and their punishment will be no Christmas vacation and a seemingly boring boat trip with their parents instead. To their surprise, the destination is a spectacular remote island. But a terrifying storm rolls in and they're forced to seek shelter at a mansion belonging to the eccentric ...

Javi, a young rent boy living in Madrid, comes to a sauna club looking for a job. But soon he'll find out a place full of secrets, the biggest of them being a strange man who will fall in love with him: the Phantom of the Sauna.