On his most recent leg of a quest for belonging that has already taken him from his hometown in suburban Ohio to Arizona to Korea, Billy Cox finds himself at the Grand Canyon. Spiritually marooned and seeking to forget -- or at least find meaning in -- a recent heartbreak, Billy spends a summer as an employee of the National Park. When what he finds resembles chaos more than it does closure, Billy grapples with what may be one of life's inherent uncertainties: what does it mean to really understand ourselves? What happens after we realize we never really do?