Gorlois, Duke of Cornwall rides out to meet King Uther Pendragon in battle. He submits to the power of Excalibur and war is averted. The knights ride to Hartbrook with Sir Cadfael and his sister Rohnwen in order to see her wed to Rhun , son of Baron Cadfan of Hartbrook. Rhun is a spoiled brat and gets himself kidnapped by the fae. He is trapped in their kingdom until Rohnwen exchanges herself for his release. Shamed, the lad offers his services unconditionally to Sir Cadfael.