The series is set 97 years after a devastating nuclear war wiped out almost all life on Earth. The only known survivors are the residents of twelve space stations in Earth's orbit prior to the war. The space stations banded together to form a single massive station named "The Ark.
After the Ark's life support systems are found to be failing, 100 juvenile prisoners are declared "expendable" and sent to the surface in an attempt to determine if Earth is habitable. Confronting the dangers of this new world, the teens struggle to form a tentative community and discover that not all humanity was wiped out.
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