Forty-two millennia later, the Great Rift ripped the galaxy in two, the Emperor's light gradually dimmed, and half of the Imperium of Man was plunged into endless despair and war. In this dark realm known as the "Dark Side of the Imperium," whispers of Chaos corrupt the hearts of the people, a surge of xenos devours the stars, and the isolated world of Mankind, plagued by suspicion and internal conflict, is on the verge of self-destruction.

However, when a soul, burdened with a thousand years of infamy, returns from the Warp, everything will be turned upside down. Astra Sarahar, scion of the former First Legion, a "Fallen Angel" hunted by his former brothers, opened his eyes in the darkness of despair.

What kind of fate awaits him?

(The early part is boring, no problem, but the latter part is even more boring, haha.)