More than a year after the defeat of Arawn Death-Lord's army and death of his warlord the Horned King, Prince Gwydion calls allies to a council hosted by Dallben, one of Taran's guardians. Men are disappearing throughout Prydain, while an increasing number of the undead Cauldron-Born have joined Arawn's forces. At the council, Gwydion reveals an elaborate plan to steal the Black Cauldron, the magical artifact used to create the Cauldron-Born, from Arawn. King Morgant will lead the main force in an attack on Arawn's stronghold of Annuvin, while a smaller raiding party led by Gwydion breaks off to enter by a mountain pass known only to Coll that will allow them to steal the cauldron undetected. Three men have been designated to remain behind with pack animals to serve as a rearguard and secure the retreat: Adaon, the warrior son of chief bard Taliesin; Taran; and Ellidyr, Prince of Pen-Llarcau, who is arrogant, wiry, strong, and threadbare. Ellidyr disdains Taran for his place on the farm and his unknown parentage. Taran envies Ellidyr for his noble birth, despite Dallben's counsel that that youngest son of a minor king has only "his name and his sword". Both are dismayed to share a role with no chance for glory.