In the near future, a massive power outage darkens North America. Sisters Nell (Ellen Page) and Eva (Evan Rachel Wood) live in a house in a forest far from the nearest town with their father Robert (Callum Keith Rennie). They're more alone now than they've ever felt before.
As the blackout drags on and their supplies dwindle, the sisters battle starvation, sickness and trespassers. With a possible apocalypse looming, they'll have to rely on their wits to see them through.