The earth was pretty much a death trap. That is–for the few people left. I'll be honest, there aren't many of us. The world has been infected with a virus. This virus kills almost everyone, and those who survive turn vicious. They are smart, manipulative, and merciless. Even more rare, are the immune, people who with stand the virus altogether. Like Sadie. Her and her two friends were the only immune they know of. Until one day when she is saved by cute, mysterious Devon and his group of immune. The two groups join together in hopes of figuring out what exactly this virus is, and how they can survive it.