Having escaped to the Unknown Regions, Lina and the others seek help from the village people of Sparks.

There are no cars, planes, televisions, or smartphones. Climate change wreaked havoc on Earth hundreds of years ago, and now people live a simpler life. Then thirteen-year-old Keith uncovers a secret. It's a mysterious mission known only as Project F. It's exciting, it's revolutionary, and it's going to change the world. It's exactly the kind of adventure Keith has always longed to be a part of. And what is adventure without a little danger, right?...