Merlin's grandson, Tamwyn, and his friends race to stop the warlord Rhita Gawr from destroying Avalon.

A young boy who has no identity nor memory of his past washes ashore on the coast of Wales and finds his true name after a series of fantastic adventures.

As the warlord Rhita Gawr tries to gather enough power to destroy Avalon, Tamwyn--the heir to the powers of his grandfather, Merlin--and his friends embark on separate quests to try to save their world.

Merlin's fragile home on the isle of Fincayra is threatened by the attack of a mysterious warrior with swords for arms and by the escape of Stangmar from his imprisonment, as Merlin continues to move toward his ultimate destiny.

The dragon Basil leads the ultimate battle to save the land of Avalon, and finally must decide whether to obey his dear friend Merlin's request, even though it means giving up his powers as a warrior.

Having stumbled upon his hidden powers, the young wizard Merlin voyages to the Otherworld in his quest to find himself and the way to the realm of the spirit.

Through adventures involving a haunted marsh, talking trees, and the creature called the ballymag, the wizard Merlin continues to experience both his growing powers and his essential humanity.