Settings and characters The Frozen Throne takes place on the fictional
high fantasy world of Azeroth. In the
main game, the human paladin
Arthas Menethil was corrupted by the Lich King Ner'zhul, an undead sorcerer entrapped in ice (the titular "Frozen Throne"), and became his lieutenant. Arthas invaded the High Elven kingdom and killed its general,
Sylvanas Windrunner, whom he resurrected to serve him. He then paved the way for an invasion by the Burning Legion—a demonic force from another realm—who were ultimately defeated by an alliance of elves, humans, and orcs. In the events leading up to the victory against the Legion, Night Elf leader
Tyrande Whisperwind freed the imprisoned
Illidan Stormrage. However, Illidan consumed a demonic relic, becoming half-demon himself, and was cast out. After the Burning Legion's defeat, Illidan was contacted by Kil'jaeden, one of the remaining masters of the Legion, who tasks him with destroying the rebellious Lich King. The expansion introduces new factions to the game's universe: The Blood Elves, former High Elves that now suffer from addiction to magic; the Naga, mutated former
Night Elves; the Draenei, the original inhabitants of Draenor, the orc homeworld now known as Outland; and the Pandaren, a race of globetrotting, anthropomorphic
pandas.
The Frozen Throne follows the quest of the Night Elf warden Maiev Shadowsong to recapture the renegade
Illidan Stormrage, Blood Elf prince Kael'thas' struggle with the Alliance and subsequent service to Illidan, Arthas' attempt to rescue the Lich King from Illidan's assault, and Sylvanas Windrunner's fight for independence.
Plot Maiev Shadowsong pursues the fugitive Illidan to a set of islands. There, she finds Illidan has allied himself with the Naga and obtained an artifact called the Eye of Sargeras, forcing Maiev to call on Illidan's brother Malfurion Stormrage and Malfurion's wife Tyrande Whisperwind for aid. Illidan flees with the eye to the kingdom of Lordaeron. When Tyrande is swept away by a river while helping a group of Blood Elves led by the prince Kael'thas, Maiev convinces Malfurion that she died to maintain their pursuit of Illidan. They capture Illidan and destroy the Eye, which Illidan reveals he was using to destroy the Lich King. When Kael'thas informs him that Tyrande may still be alive, he uses the Naga to help Malfurion find and rescue her. In thanks, Malfurion pardons him for his past crimes. With Maiev still in pursuit, Illidan flees to Outland. In Lordaeron, the Blood Elves are in an uneasy alliance with Garithos, the racist human commander of the remaining Alliance forces. When their prince Kael'thas is only able to complete a number of demeaning tasks with the help of Illidan's Naga, Garithos imprisons Kael'thas and his forces for treason. The Naga leader rescues them and leads them to Outland, where they join forces with Illidan, who promises to satisfy their addiction to magic. Together, they take over Outland. Illidan's master Kil'jaeden finds Illidan and plans to punish him for failing to destroy the Lich King, but decides not to when Illidan claims that he traveled to Outland to recruit forces for a new assault. Arthas returns to the Undead-controlled regions of Lordaeron where three dreadlords loyal to the Burning Legion - Balnazzar, Detheroc, and Varimathras - rule. Arthas informs them of the Legion's defeat and retreat before declaring himself king. While purging the kingdom of the remnants of the Alliance aided by Sylvanas Windrunner and the Lich Kel'Thuzad, Arthas notices that his powers have diminished. The Lich King telepathically contacts Arthas and explains his loss of power is a result of Illidan's attacks, and summons him to defend the Frozen Throne. Arthas leaves for Northrend where he, with the help of the Lich King's minions, defeats Illidan in a duel. Arthas shatters the ice of the throne and dons the Lich King's helmet, thereby joining their souls and becoming the new Lich King. Meanwhile, in Lordaeron, Sylvanas is freed from the Lich King's control. With the help of Varimathras, she kills the remaining two dreadlords and Garithos and declares Lordaeron the home of the free undead, rechristened the "Forsaken". Untouched by the events in Lordaeron and Northrend, Horde Warchief
Thrall builds a new kingdom called Durotar on the continent of Kalimdor. Rexxar, a half-ogre beastmaster and adventurer, is tasked by Thrall and other inhabitants to help build the kingdom. He is aided by Rokhan, a troll shadow hunter. Rexxar learns that humans from the island of Theramore plan to invade Durotar, led by Admiral Daelin Proudmoore, who is unwilling to accept the truce between humans and the Horde. With the help of the admiral's guilt-ridden daughter,
Jaina Proudmoore, he leads an assault on Theramore, slays the admiral, and leaves Jaina in command of the city. ==Development==