After tragedy strikes Henry and Penny, he befriends a tenacious young girl and discovers she is constructing a raft to sail across the Atlantic to find her lost father. Together, along with some unlikely friends, they set forth to construct the vessel and subsequently rebuild their lives.

Beatrice Prior and Tobias Eaton venture into the world outside of the fence and are taken into protective custody by a mysterious agency known as the Bureau of Genetic Welfare.