The Ghoul (2016) 
A festival flick recently released by Arrow, leaving you with more questions than answers. The plot, in a nutshell, follows a detective going undercover as a therapy patient in order to steal files from his therapist that might incriminate the lead suspect in the case he's working on. Once the sessions begin though the lines start to blur and things don't seem what the viewer first thought.
I'm a little undecided, on one hand it's superbly well acted (weird Paul Kaye scene aside) but on the other hand the plot doesn't really make sense but also goes to great lengths to make sure the viewer understands the concepts it's trying to push on us with some exposition.
It's not really what I was expecting, I thought it'd be a British indie horror along the lines of Kill List but it's more of a psychological drama piece. Worth a watch I think, but one for the sales - I bought the download on iTunes over Christmas when it was £3.99 (back to a tenner now).