The underground city of New Canaan is safe from the Forgetting which afflicts Canaan above ground, but in her rigidly controlled and repressive city eighteen-year-old Samara, one of the Knowing, is plagued by her memory of the horrors she has seen, and determined to seek answers in the cursed city above--where she will find Beckett Rodriguez and his parents, on a mission from Earth to study the lost colony.