There are secrets that do not want to be revealed! When Kaeronia, a world of the Adeptus Mechanicus that disappeared a hundred years ago, mysteriously returns, the Inquisition sends Gray Knights there to investigate the possible contamination of the planet with the miasma of Chaos. But what Alaric and his battle-brothers discovered exceeds their wildest expectations. Fate pits brave warriors against the Dark Mechanicus and their possessed machines. But the most monstrous weapon - and at the same time the most valuable treasure - is kept in the belly of the infected planet...