This graphic novel reintroduces us to Ember, the doomed city of darkness that was built to ensure that humans would continue to exist on Earth.On Assignment Day, 12-year-olds leave school and receive their lifetime job assignments.Lina becomes a messenger, and her friend Doon ends up in the Pipeworks beneath the city.They unearth an evil plot from the government to steal away precious resources from people who live in Ember.Using clues left behind by Lina's late grandmother, they travel beneath Ember's tunnels in a desperate attempt to find a way out.