Four young knights, Rohan, Deirdre, Angus and Ivar, defend their ancient homeland of Kells from attacks by the evil Queen Maeve who is intent on ruling the island kingdom. The knights bravely resist Maeve's dark sorcery, battling giants, ogres and evil mythical creatures. Their quest to restore peace to the land leads the knights to discover their mystic armor and their dragon ally, Pyre, who joins them on adventures filled with danger, magic, and the roguish little people who inhabit the enchanted underworld of Tir Na Nog.
The Knights discover a dragon's egg in the forest and must keep it from Maeve. Meanwhile, Angus falls in with some old thief friends of his, and Deirde and Garrett attempt to work out their relationship.
Now hatched, the baby dragon is sought by both the Knights and Maeve.
When the Northmen, a race of savage invaders, kidnap Conchobar and threaten the whole island, the Knights offer a truce to Maeve to fight them off. However, the invasion is all a ruse of Maeve's to take over Kells.
Ivar is told the story of how Angus and Rohan became friends as children as well as how Torc joined with Maeve.
Rohan and Deirdre work to clear Angus when he's accused of robbing villagers and vandalizing their properties. While Ivar is busy looking for the real culprit, Maeve summons a fire monster and sends it to Kells.
Tricking Cathbad into turning him human-sized, Mider overthrows Maeve and becomes ruler of Temra. Realizing the power-mad fairy is a more dangerous threat, the Knights aid Maeve in taking back her throne as the answer to King Fin Varra's advice.
