Blending excellent reporting and strong storytelling, this is a disturbing film truly stranger than fiction

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.

A film of deceptively outspoken contemporary relevance, this is cinema at its most alert, alarming and alive.

One of the film's great tricks is that, for a time, you think it will go down a rabbit hole of unrealistic glorification.