With a single act of destruction, Sylvanas Windrunner has ripped open the way to the afterlife. Azeroth's staunchest defenders have been dragged into all-consuming darkness. An ancient force of death threatens to break its bonds and unravel reality. Hidden realms of wonder and horror await any who would pass to the other side. The Shadowlands is home to an entire realm of the departed; it is a world between worlds whose delicate balance preserves life and death itself. As one of Azeroth's greatest champions, you have been granted the power to cross over in body and soul. Now you must investigate a conspiracy to unmake the cosmos, and help Warcraft legends journey back - or fulfill their ultimate destiny.
—Blizzard Entertainment