Coll Hazel may be the youngest bard, but he is sent on the most important quest of all - before next wintereve, he must find the mythic Avalon, home of King Arthur, and lay the thirteen sacred treasures to rest. Along Coll's journey, he encounters giants, demons, fairies, merfolk and sealwomen, wizards, witches, wise women, heroes and enchantresses. His travelling companion is the raven, Branwen - funny, opinionated and wise. As they face danger and make new friends, they tell each other tales. These stories are taken from the whole Celtic canon of literature that includes the Mabinogian, the Irish stories of Finn MacCool, and the Arthurian legends, as well as stories from Cornwall, Scotland, the Isle of Man and Brittany.