This is the day that everyone gets their jobs. Little did Lina and Doon know that they would not get the jobs that they wanted. They are waiting for their turn.
Since Lina has the job Doon wants, and Doon has the job Lina wants, they make trade. Now Lina is happy because she gets her dream job. And Doon can get near the generator room.
Lina Finds the Instructions and is trying to decipher them. She believes they are important, and that they lead to a whole new world. She won't stop at nothing for this.
Lina Tells Doon about the Instructions after she realizes that no one else cares. She knows that Doon would love to help and save Ember. He listens and actually believes her!
Clary helps Lina learn that the word of the title could be Egress (exit). Clary also cares and with this info they could now finish solving the instructions. And they get to go to a whole new world too!
Lina and Doon leave Ember after they realize that they are in trouble. Lina brings Poppy along and they go on a wild adventure. They end up outside, seeing the moon and stars in all of its glory.