In the not-too-distant future, two young women, Nell (Elliot Page) and Eva (Evan Rachel Wood) must struggle to survive after a mysterious continent-wide power cut. Lacking electricity and gasoline, the sisters find themselves isolated in a run-down country house. Their only connection to society comes from the frantic radio reports of breakdowns, terrorism, disease and uncontrolled violence that grip the nation. Nell and Eva must work together to fight intruders and starvation, as they strive for survival in a world on the brink of apocalypse.