For years, the heroes of the Alliance and Horde have battled the evils of Kalimdor and the Eastern Kingdoms, the demons of the Burning Legion in Outland, and one another — all the while unaware that a threat deadlier than any before was stirring in the frozen continent of Northrend. Now the Lich King, Arthas Menethil, has emerged from Icecrown Citadel to claim the world as his own. Heroes of the Alliance and Horde gather in Northrend to make their stand against the malevolent being who dares declare himself Azeroth's one true king — and who seeks to scour all life from the world.