Among the ornate spires and enchanted streets of Dalaran, a dark presence stirs within the mighty walls of the Violet Hold. Long used to restrain threats to the city, the tower holds row upon row of deadly inmates, and it has been diligently watched over by the Kirin Tor. However, a sudden assault has tested the integrity of the hold, putting at risk the safety of everyone outside the prison's walls.

Using the dungeon as a means to breach the city, Malygos and his blue dragonflight have begun to chip away at the Violet Hold's defenses, hungry to reclaim arcane dominance over Azeroth. Only the brave souls of those protecting the prison stand between the continued existence of Dalaran and the city's utter annihilation.