Mark is a regular 17-year-old kid living in Anbrook, Maine. Except... his brother is missing, and he has to find him.

One day, Mark is drawn to the woods he's been warned to stay away from his whole life. But he just has a feeling that's where his brother is. While searching for his brother in the woods, Mark passes out. When he wakes up, he finds himself in the hospital and learns that everything that just happened wasn't real. There he meets Josie, who has a lot in common with him. Almost too much. They decide there is something weird about the place, and they have to get far away. They are led on a long journey, desperate for answers, always trying to stay out of sight and away from people who might try to force them back. Along their journey, they meet friends and enemies, all while trying to uncover the secrets of the mysterious building.