Your blood may run cold, but you now find yourself pinioned to the story.

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

Each character in this movie — down to the smallest one — is an individual rather than a type, prone to spontaneous changes of mood and sometimes amusing outbursts of pettiness or ill humor.

The film's masterful storytelling did its job. The message was clear. No need to overdo.