Audius lost everything to the Carcharodons Astra, and continues to fight the battle of Tranquillity II decades after it has ended.

In his war against the phantom Astartes that plague his mind, he finds himself cast through the Warp to an alien world unlike any encountered by the Imperium before.

Even on this peaceful world, inhabited who instinctively wish to help the maddened Astartes, the shadow of the Red Wake looms over him as the screams of those he failed to protect echo all around him.

Will the Ponies of Equestria help Audius find peace, or will his grief consume him?