Takes place in the dark city of Ember, a decaying place with no natural light surrounded by the vast Unknown. Although ancestors had arranged for information on leaving Ember to be made available after the inhabitants have spent 200 years there, a corrupt mayor lost the information many years before the novel begins. Two hundred and forty-one years later, Ember’s electrical lighting frequently fails, supplies are dwindling, and the populace is growing increasingly frightened. Twelve-year-old Doon and his acquaintance Lina are intent on finding a way to save Ember. After Lina finds a mysterious and fragmented paper titled “Instructions for Egress,” they think they have a way out. Can they escape from the villainous mayor and his soldiers? Can they figure out the missing letters and words in the message? Do they find their way out of Ember and up to a post-apocalyptic Earth?