The Cuckoo's Curse
El cuco (original)
Zwei Paare, Marc und Anna aus Spanien und Hans und Olga aus Deutschland, tauschen ihre Wohnungen für den Urlaub.
Starring Belén Cuesta, Jorge Suquet, Hildegard Schroedter, Rainer Reiners, Chacha Huang, David Selvas, Manel Dueso, Marina Gatell
It's a drama and thriller movie, and has a rating of 5.6 out of 10 from Imdb which is fairly okay for this kind of movie.
Watch it here
Not found streaming from Belgium.