The story starts 6 years in the past. A nuclear warfare has broken out and Eli and most of his family make it to a shelter their rich father Rex Yankakis made before the bombs fell. Unfortunately Eli's brother, Eddie and their grandmother don't make it to the compound and die.
Now 6 years into the future, the Yankakis family has been living in comfort for most of the time. As the years dragged on for the sad family several things in the compound went bad. So now Rex plans on using children he and his wife conceived as food or supplements for the family. He also intends to attempt to clone the children. But something even more terrible occurs. Eli discovers that internet is still up after 6 years of the overground being a radioactive wasteland.
Unintentionally becoming close to the supplements and the revelation that their father has been lying to them this entire time, Eli is force to take sides. He can side with his mother and younger sister who want to leave the compound, or he can side with his older adopted sister, who want to stay in the vault and attempt to begin cloning the supplements
Through his exploration of the internet Eli discovers that the whole world is fine, and that everybody above ground thinks that most of the Yankakis family died in a fire. Eddie and grandmother are still alive. Eli confronts his father, and Rex says that its all true. Rex also says that he did all this as a test to see how far the family would go to survive. Eli then knock s out his father.