Thirteen-year-old Piro watches powerless as her father's enemies march on his castle. A traitor whispers poison in the King's ear, undermining his trust in her brother, Byren.

Determined to prove his loyalty, Byren races across the path of the advancing army, towards the Abbey. Somehow, he must get there in time to convince the Abbot to send his warriors to defend the castle.

Meanwhile, the youngest of King Rolen's sons, Fyn, has barely begun his training as an Abbey mystic, but he wakes in a cold sweat, haunted by dreams of betrayal...