Simple and well acted, it has tension enough to knot the stomach.

Go in cold, and you're likely to emerge with your blood boiling. This has to be seen to be believed.

After playing with our expectations, this turns out to be a very different sort of film.

There are moments that feel comical, some horrific, and some downright inspiring but the tonal shifts hardly matter as the end results come to a film that's perfect for this time.