Richard De Clare, Lord of Bunratty, wants the head of the Silver Stag on his castle walls. Four children are determined that this will not happen, for the stag is a magical creature. The mysterious lady in the tower, Dame Anna, has told Tuan, Cliar, Maude and Matthieu that despite their differences they must work together to save the stag.

But they are living in an Ireland full of war and danger and saving the stag is only the beginning of their adventures. Soon they themselves become the hunted ones. With the life of Tuan in danger, they must make their escape from Bunratty, row across the stormy waters of the Shannon and brave the dangers of the wild men of the woods. Tuan wants to return to his clan, Maude and Matthieu are seeking their lost father and Cliar is looking for the home she never knew.

Who knows where their journey will lead them?