Mia Harper was not prepared for a solar flare to knock out the world's electricity. No one was, although Mia and her fifteen-month-old sister had a slight advantage: their father, a hardcore doomsday prepper, left them a safe haven to help them survive their new reality.

Andrew Greene is Mia's childhood friend. On track to graduate college at nineteen years old, his sharp mind gives him an edge against the competition.

How will the trio survive the harsh winters of Pennsylvania? How will they survive attacks from hungry wildlife? What will they do when faced with perhaps their greatest danger: the other survivors?

Can they live in this new world? Or will their Shelter turn into their tomb?