"“Man is a wolf to his fellow man,” a taxi driver tells his female passenger, as their vehicle wends its way towards a monolithic prison block. “And how do wolves live? In packs. Got it?” She hasn’t – not yet – but she will soon enough. The new film from the Ukraine’s Sergei Loznitsa is a wildly ambitious, persistently jaw-dropping odyssey into Russia’s heartless darkness. It paints the country as a place where humans circle one another in predatory spirals, snapping at any sign of softness, while blocking any prospect of escape."