Raven's Flight (Audio Drama)

Raven's Flight is the first audio drama released in the Horus Heresy Series released in both CD and MP3 formats. It was written by Gav Thorpe, directed by Lisa Bowerman and performed by Toby Longworth. It was later published in printed form in Shadows of Treachery (Anthology) and re-released in an enhanced audio edition in 2015, but can still be bought as a stand alone audio drama.

Synopsis
Raven's Flight follows the desperate Raven Guard Legion after their betrayal during the Dropsite Massacre of Istvaan V. The Raven Guard find themselves with only 3,000 Astartes remaining out of the 80,000 that once comprised the Legion. Meanwhile, on the Raven Guard's homeworld Deliverance, Praefector Marcus Valerius is haunted by a dream of dying ravens. Believing these nightmares to be significant, he attempts to convince his superior, Commander Branne, to send support to Istvaan V, fearing for the rest of the Legion and their Primarch Corax. Ordered by his Primiarch to remain on Deliverance, Branne is skeptical of Valerius' dreams, at first dismissing them outright. But after much deliberation he makes due course for Istvaan V to determine the fate of his Battle-Brothers.