Equestria, desperate, trapped in a four-year aerial conflict against an enemy they can not beat, seeks an end to the war. Now, hundreds of miles from Equestrian soil, deep within the enemy's barren, mountainous land, an attack on the enemy force is their last option.

Slipstream’s success and the survival of her fleet, the last of Equestria’s worthy airships and captains, is based solely on the element of surprise and her own ability as fleet commander. But her fleet of the best of what’s left may not be enough to put an end to the war once and for all.