Two young British nurses are bicycling through the desolate French countryside. A mysterious stranger on a lonely stretch of road. The women become separated and soon after, one of them disappears. Now the remaining girl, alone and frightened, begins an increasingly desperate search for answers among the strangely uncooperative locals. Where is her friend? Was there a murder? And as the darkness approaches, is the killer now stalking her?

When the United States and the Soviet Union simultaneously set off nuclear explosions, London's Daily Express begins to report on bizarre weather changes around the world. But when the reporters dig deeper, they discover that the blasts have knocked Earth off its axis and sent it hurtling towards the sun. Now, cities explode in chaos and mankind is left with one last hope: A final massive detonation that will either re-balance Earth's orbit or destroy...