Half-brothers Arithon and Lysaer were laid under a curse of lifelong enmity when they defeated the Mistwraith and freed the world of Athera. As Stormed Fortress opens, Arithon is recovering from an assault by necromancers and more determined than ever to keep his vow to avoid killing. But Lysaer and his troops lay siege to the citadel at Alestron, trapping those closest to Arithons heart. The only way he can help them is by using his mage talent to invoke ancient magics, at great risk to himself.