Levi's older brother Boaz returns from fighting with the Marines in the Middle East. He's safe. Levi's family has waited three long years for this. But Boaz is no longer the brother Levi thought he knew. Even if nobody else wants to see it, Levi can tell that Boaz has changed; something's wrong. When Boaz announces he's off to hike the Appalachian Trail, Levi knows he's lying. He's heading somewhere else. So Levi follows, determined to understand who his brother was, what he's been through, and how to bring him home again.