Jenna is only thirteen when her mother is killed. She and her sister, Laney, are afraid the authorities will separate them if their mother's death is discovered, so they bury her and pretend nothing has happened. The girls struggle to find food and avoid suspicious neighbors-and things even start to look up for them until a strange, bright light appears in the sky, throwing everyone on Earth into survival mode. Jenna must find the strength her sister possesses-or she may not survive this changing world and the terrifying dangers that lurk around every corner.