An ambitious Stone Age man demands a talisman that will harden his heart, allowing him to take control of his tribe. Against his better judgment, the tribe's magic man creates the Flint Heart, but the cruelty of it causes the destruction of the tribe. Thousands of years later, the talisman reemerges to corrupt a kindly farmer, an innocent fairy creature, and a familial badger. Can Charles and his sister Unity, who have consulted with fairies such...