Present day: Icie is a typical high school teenager - until disaster strikes and her parents send her to find shelter inside a mountain near Las Vegas.
The future: Beckett lives on The Mountain - a sacred place devoted to the Great I AM. He must soon become the leader of his people. But when Beckett is forced to break one of the sacred laws and the Great I AM does not strike him down, Beckett finds himself starting to question his beliefs.
As Beckett investigates The Mountain's history, Icie's story is revealed - along with the terrifying truth of what lies at the heart of The Mountain.