"Intruders," the new thriller from director Juan Carlos Fresnadillo ("Intacto," "28 Weeks Later"), starring Clive Owen and Carice van Houten ("Black Book"), is set to open the 59th San Sebastien International Film Festival on September 16.

The film, shot in London, Madrid and Segovia, boasts a screenplay by author Nicolás Casariego and director Jaime Marqués ("Ladrones") and also stars Daniel Brühl, Pilar López de Ayala and Kerry Fox.

Here's what it's about according to the festival:

"Intruders" tells the parallel tale of two families whose lives are thrown off track by menacing apparitions: in Spain, a mother protects her son from a faceless stranger; meanwhile, in the UK, a young girl has terrifying dreams of Hollowface, a demon who becomes a real danger to the girl and her family. According to Fresnadillo, the film “reflects my love of the darkest visual universe, of the demons buried in our unconscious”. But more than a simple tale of supernatural horror, Intruders is an intense psychological drama taking the family as its central theme.

Check out the creepy teaser below: