A little boy wearing goggles in a car being moved around by Michael Shannon and Joel Edgerton. An end of days cult in the desert led by Sam Shepard. The FBI chasing the men with the boy. How to describe this masterful exercise in sci-fi and supernature by writer/director Jeff Nichols? A cast in which Adam Driver, the biggest baddie ever in my cinematic universe, is the nicest person? Kirsten Dunst is a mom? A mystery which hangs on an article of faith in which we have no known investment? This is simply great: an intelligent foray into genre that waits to give us information, drip, drip, drip and we have to work out what to believe. And why. Big wow.