The wall is invisible and it drops without warning, trapping the film's heroine (Martina Gedeck) within a forested valley in the Austrian alps. Under the dome, the woods are full of wildlife and there's a dog to keep her company. Outside, beyond the glass, the world appears frozen in time; an old man stands forever fetching water from a standpipe. Hard to believe a film so minimal could contain so much. Julian Roman Pölsler's bewitching debut manages to be at once a creepy sci-fi parable, a feminist Robinson Crusoe and a clear-eyed ode to the wonders of nature experienced in solitude. Walden pond with added wall.