Minerva, Ravi, and Thomasina find a message in a bottle, a cry for help from someone named Morgana, which has floated out of the Rowan Forest, a mysterious place supposedly protected by enchanted trees--but when the three friends set out to find Morgana they discover that it is the forest itself that is in danger.

"Inspired by the Canterbury tales, this is the story of William, a young squire with a gift for jousting. After his master dies suddenly, the squire hits the road with his cohorts Roland and Wat. On the journey, they stumble across an unknown writer, Chaucer. William, lacking a proper pedigree, convinces Chaucer to forge genealogy documents that will pass him off as a knight. With his newly-minted history in hand, the young man sets out to prove himself...