They're the last two people on the planet. And sworn enemies. Teens Jack Higgins and Skylar Williams are polar opposites. Jack is a word nerd who has a better chance of winning a spelling bee than surviving an apocalypse. Skylar is a tough tomboy with a potentially deadly secret who longs for a life of her own away from her overprotective father. Then the world goes dark and the mysterious creatures appear. Now the only thing left to do is survive...