They survived annihilation. But the real danger has only just begun... When Molly, Colton, and their group of high school students narrowly escape a field trip gone wrong, they return home to find their town in a state of chaos. An EMP has devastated the world. And life has been reduced to a daily battle for survival.... After a derailed train throws what's left of the town into chaos, Diego, the father of one of Molly's students, quickly takes charge. At first, he seems determined to help the survivors and clean up the train's wreckage. But it soon becomes clear that he has a sinister motive of his own for taking over. And Molly is certain he can't be trusted... Molly will do anything to protect her students. But can she lead them to safety when the entire world has fallen into chaos?