Aboard Floki Magnusson's longship Silver Dragon, Gil, Danni, Rachel and Ismail continue their quest. Hunted by the Golden Knight, they find shelter at the muinntir of Hy where Lionheart endures the blacksmith, and Gil learns of the Lady Janetta's imprisonment in Camelot. When the Raiders attack, the brethren ensure the children's safety at the cost of their own and Gil vows to avenge them. But on the gruelling longship traverse of Glen Alban, a chaotic, mistaken battle shows him the price of vengeance. And on the Great Loch of Alba, a primeval terror changes the fate of all. Still, ahead, the road to Camelot climbs into the hills, and parting from the Northmen, the Warriors and their ponies journey on, with only the Knight Palamedes for guard. Then, deep in the Forest of Caledon, the sounding of the Questing Beast draws the Saracen knight away. Aided only by their Change-Thing Others, the Warriors yet achieve their goal and in the beautiful gardens of the Mews Tower Gil finds his green-eyed girl, as fearless as she is lovely, and companioned by a knightly Percy, Danni's lost brother. Still many dangers must be faced and many trials endured before, together at last, they ride the forbidden Forest of Pentecost to claim the Grail. And behind them, the usurper's forces close in, and before them the unearthly Guardian of the Chapel bars the way ...