With their protector Mac Rath away at war, life at Castlecraik is frustrating for Donnell and his friends. Hunting boggles in the forest brings them no closer to their goal of finding the missing druid stone – and rebuilding the circle of druids.
When the young nobleman returns, it is clear that he has his own reasons for taking them into his household. The quest: to retrieve the legendary weapon from the ruins of Anwen’s Cairn, deep within the forest. But no sooner have they set out than the great Norse dragonships of an invading army begin to arrive. Can the companions find what they are looking for – and do so in time to save their people?