Ever since a fever when Jin An was six, his body has changed in subtle ways. His wounds heal quickly, and as he grows older, he develops sleepwalking episodes. At night, the sleepwalking Jin An is like a completely different person from the one he is by day.
At fourteen, following his father's wishes, Jin An plans to travel to a temple three miles away and become a monk. But one night, while sleepwalking, he wanders off to a Taoist temple instead and becomes a disciple of the Taoist faith. His extraordinary journey begins at that temple.