Acting is pretty subpar and it doesn't offer much in the way of twists, but it's a decent, well-contained psychological thriller that doesn't overstay its welcome.

This one is not a horror movie, which in fact makes it even more thrilling. It is a movie about mental illness, friendship and trust. The film shows very authentically how the illness presents itself to the affected person. Combined with the other main character (who by no means shows completely healthy behavior either), this results in a subtle tension that lasts until the last scene.

Excellent psychological thriller. More emotionally disturbing than scary. 7/10 stars.