-Sent to a fallout shelter to survive a nuclear catastrophe, a group of teenagers are the last hope for humanity. Can they survive living with one another first? Katrina knew this day would come. She had been preparing for it all her life. The end of the world was here, and it looked nothing like she had imagined. Now she was trapped in an underground fallout shelter with a group of teenagers who had been selected as the last hope for humanity. The idea of surviving the nuclear apocalypse alone blurs as she makes friends, and finds love, while buried beneath the earth.