Sixteen-year-olds Matt and Dani are deep underground in a theater storage room when nuclear missiles hit, and when they emerge one month later, they struggle to survive in the radioactive wasteland that was once their home.

Survivors of World War III, Matt and Dani meet a wise old man who gives them advice about the survival skills they'll need in the deadly ruins of America.

Matt and Dani cross the ruins of post-nuclear war America in search of Matt's parents and discover the mysterious caves of Thunder Mountain

Matt and Dani, survivors of World War III, try to warn a makeshift community in Denver about an approaching flood