The game is set in the land of , a world that has fallen into a state of hopeless despair under the influence of ancient curses.

The story unfolds over four expansive Acts , each featuring its own unique environment (such as a desert or a besieged fort), bosses, and narrative arcs.

Beyond the narrative, the "story" of your playthrough is defined by complex, interlocking mechanics:

You assemble a band of heroes to track down a sinister being known as the Rift Lord , an evil necromancer responsible for the chaos.