Tells a fascinating and unsettling true story, and does so well, without pretending to have all the answers.

As somebody who had not heard any of this before, it became a curious phenomenon to sit and watch a film and slowly have the realities begin to click into place.

This is a must-see and one of the best documentaries - and films - of this year.

Great story, amazing characters, superb action, enthralling cinematography. Yes, this is something I am glad I spent money on.