When a nuclear device causes an electromagnetic pulse that kills power to more than 200 million people, a teenage girl must help lead her family to survival in a dark new world. 放弃一贯的私人化叙事模式，但这种带有疏离感的冷静叙事方式恰好符合影片所需要的独特气质，只是稍微破坏了一点影片的商业性，使得影片节奏过于散乱。