The Horde of Thrall set foot on the lands of Durotar intending to settle by expanding its ranks. Every member of the undead Forsaken was invited to join the team of tauren, trolls, and orcs to form a strong wall. Stormwind, the human kingdom, guides the Alliance who have brought under their control all gnomes, night elves, and dwarves to stay forever loyal to the dynasty. Highlord Bolvar takes over the position as Regent when the king of Stormwind disappears.
The black dragon Onyxia controls the mind of Bolvar and manipulates him into toppling his position. Onyxia rules the empire in disguise of a noblewoman, which later is divulged to the heroes. As they decide to take on Onyxia, Horde and Alliance get on the verge of being endangered by the elemental lord Ragnaros. As Ragnaros comes out to set fire to the whole dynasty, the heroes of Alliance and Horde defeat Onyxia and put back Ragnaros into the Elemental Plane.
The trade show of ECTS that was held in September 2001 was the first platform where Blizzard announced the World of Warcraft. The open environment game where the players move around and do whatever they please was the perfect setting for this story. It took about 4-5 years for the development team in Blizzard to release the final version of the game. 3D graphics and every motion technique used in the game were highly advanced at that time, which gave the game a boost that was expected of.