The nation of Equestria has enjoyed an unprecedented state of peace and prosperity for a thousand years. War is all but unknown and the year is filled with celebrations and competitions. This all changes when a ghost from Equestria's past returns with an army, intent on taking the throne, joined by the nation's most ancient and dreaded enemy

Equestrian forces sent to fight are slaughtered without mercy, as their too ill-equipped and ill-trained to match the enemy's savagery and firepower. Soon Ponyville becomes the new front and as the mane 6 are drawn into the war, they must all start making decisions which could have dire consequences

As they come face to face with the horrors of war, will they still be able to use the Elements of Harmony or will the magic of friendship be another casualty