Chained

This is the most unpredictable horror thriller I have ever seen. I don't know a similar movie.

Though I was skeptical about Vincent D'Onofrio. I know him well from Full Metal Jacket and many episodes of Criminal Intent in the role of the investigating cop. How can I buy that he is a psychopath and a serial killer? But a few minutes later, I forgot that it's him, because of the shocking scenes. He plays a man-made psychopath without empathy and without compassion. Not a glimpse of compassion. The unpredictability of him generates horror since anything could happen at any time. The story reveals what has made such a monster out of him, but also shows, that not everyone becomes a psychopath.

The other main actor, Eamon Farren also plays brilliantly.

There is not a ton of action but it's not boring, trust me. It is frightening but also a sad story. You will see.