Obsession
Used the new IMDb hack on this one, if you don't know what it is, it's basically if you type play before IMDb in the URL of a movie, you get it for free.
But in all fairness, this movie was brilliant. Like incredibly good I thoroughly enjoyed it. The acting is off the scale (especially the person playing Nikki she was so good)
Dont wanna spoil the ending, but you will be sat there wondering "what the heck just happened?"