Lina Mayfleet and Doon Harrow sit anxiously waiting for their job assignment. Lina is hoping for Messenger for the City of Ember and Doon a job in the Pipeworks. He is sure he can fix the generator that runs the city!
Doon gets a Messenger job, which he is not happy about. He does not want to run around the city delivering messages while Lina gets a pipeworks job, so they secretly decide to switch jobs!
Doon cannot fix the generator! The City of Ember will either plunge into darkness or the residents will starve. Lina and Doon must find a way to escape!
Lina tries to decipher the note and realizes that it is instructions on how to escape Ember! She runs to share the news with Doon.
Lina walks into her house to find her little sister, Poppy, chewing a piece of paper that looks like instructions for something. She grabs the paper away from Poppy!
Doon and Lina follow the instructions on the note, which leads them out of the city. They are shocked to find out that the City of Ember is underground!
Lina and Doon frantically look for a place where they can send the instructions on how to escape, back to their friends in Ember!
Lina and Doon finally find a way to get a message back to their friends and family. They can't wait for everyone to arrive and enjoy the beautiful surroundings.