Once upon a time, three powerful orders of Adeptus Astartes swore together to protect the scattered planets of the Intercession of Elara. Star Scorpions died due to failures in their own genocod. The Heavenly Lions were destroyed by the Inquisition for sins they did not commit. And now, hundreds of years later, the Cover continues to be guarded only by the Spear of the Emperor - savages opposing the Outer Darkness, bleeding, but not broken for many years of service. Amadeus Kayas Incarius, a brother from the Mentor Legion, travels through the Great Rift to make sure Copies are ready for battle. But instead, he finds himself embroiled in a messy and hopeless gnawing, which turned into a crusade on the far outskirts of the Imperium, drowned in the darkness. The decisions he has to make here, away from the light of God the Emperor, will determine the fate of the order, exhausted by wars.