Nancy writes a report for school about her great-grandfather, making things up so he seems less ordinary, but when she learns that Grandpa will be there to hear her read the report aloud she realizes she was dishonest.

In this retelling of the Korean legend The tale of Shim Cheong, sixteen-year-old Mina is swept away to the Spirit Realm, where, assisted by a motley crew of demons, gods, and lesser spirits, she sets out to awaken the sleeping Sea God and save her homeland and family from deadly storms.