The Sundered Lands are a vast collection of islands adrift in the sky. Trundle the Hedgehog has been living peacefully on one of them until Esmerelda Lightfoot persuades him to set off with her to find the six lost crowns of the ancient badger lords. The legends say these crowns have the power to unite the Sundered Lands, so they mustn't fall into the wrong hands. The trouble is, Grizzletusk the pirate and Esmerelda's sinister Aunt Millie are hot on Trundle and Esmerelda's heels!