The Emerald Dream is a verdant and powerful place that serves as a source of life and hope and is essential to Azeroth's continued survival. It has been protected for centuries under the watchful eyes of the Green Dragonflight. In those centuries, they have fought off the Old Gods, the Burning Legion, and other threats. Now vulnerable to attack once again from Fyrakk and his forces, Azeroth's champions must pull together to save it from destruction at all costs.

A special seed, planted by Tyrande, has grown into a new World Tree and is on the verge of crossing into Azeroth. Fyrakk and his forces, including his new allies—the Druids of the Flame, move beneath the boughs of the World Tree, inflaming the Dream denizens as they attempt to infuse the heart of the World Tree with fire and use it as a conduit to spread eternal flames throughout Azeroth.