Ruins of Ahn'Qiraj
During the final hours of the War of the Shifting Sands, the combined forces of the night elves and the four dragonflights drove the battle to the very heart of the qiraji empire, to the fortress city of Ahn'Qiraj. Yet at the city gates, the armies of Kalimdor encountered a concentration of silithid war drones more massive than any they had encountered before. Ultimately the silithid and their qiraji masters were not defeated, but merely imprisoned inside a magical barrier, and the war left the cursed city in ruins.
A thousand years have passed since that day, but the qiraji forces have not been idle. A new and terrible army has been spawned from the hives, and the ruins of Ahn'Qiraj are teeming once again with swarming masses of silithid and qiraji. This threat must be eliminated, or else all of Azeroth may fall before the terrifying might of the new qiraji army.