With the rain still dampening the pavement of the city, the two princesses talk of how different life is now that all its citizens are airborne.

Past the borders of Bridlewood forest lies Cloudyearner Keep, an ancient prison built long ago when fears of invading Pegasi plagued Unicorn society. The tribes now reunited and Pegasi magic restored, Hitch, Izzy and Zipp must recover the lost art of Cloudbusting from its depths before Zephyr Heights is consumed by the unbridled rage of slowly worsening storms.