Lina, Doon, and Poppy reach the surface, where they witness the sunrise; and later tie a message of their discovery to a rock and drop it into the city, where it is found by Loris.
Lina, Doon, and Poppy eventually reach the Earth's surface, where they witness a sunrise for the first time in their lives. The movie ends as they tie a message to a rock and drop it from far above it into the city − where it is found by Loris.