The discovery of a raven in the chimney of her New York City apartment proves to be a harbinger of change in Kelsey's secure life as her friendship with her best friend fractures and her mother falls in love.
In the remote north, a young girl calls on the raven to take her on a magical journey through the air, under the sea, and finally to a warm fire, where the elders sit and the native spirits dance.
In their magic treehouse, Jack and Annie are again transported to King Arthur's realm, where invisible beings, giant ravens, and mistaken magic spells have a duke's castle in an uproar on Halloween night.