Unbearably slow, dragged out build-up of tension and confusion, with no explanatory payoff. The whole thing is like a funeral dirge with kaleidoscope effects. Cutting back & forth to flashback scenes, including a gratuitous affair, only added to the annoyingly disjointed effect, without a clue as to any discernable point or premise. Only those who are content to stare at Natalie Portman will not be disappointed with this vacuous film.