The City of Ember: Chapter 15

In chapter 15, A Desperate Run, Doon and Lina finish their exploring in the river room and go home to get ready. While Doon was packing, he over heard 2 guards looking for him to arrest him (because of the "awful lies" he and Lina said about the mayor.) The next day, he went to Lina to tell her the awful news. They hid in the school. No one was there, it was a day off for the Singing. They decided to leave the city alone, but leave a note for Clary, telling her about the way out. But Lina was spotted by 2 guards while delivering the message.

QUESTIONS: Do you think Lina will get caught? Will Doon leave without her? What will happen to ember?