After returning from Calth and the Underworld War, Sergeant Aeonid Thiel is summoned before his primarch Roboute Guilliman. The fragile peace of Imperium Secundus is threatened by traitor warbands left behind by the Shadow Crusade, and a new order of battle must be written... One of the great things about the Horus Heresy series is learning about the characters and events that shaped the 41st Millennium, and few heroes are more pivotal than these two: Sergeant Aeonid Thiel and Rouboute Guilliman, Primarch of the Ultramarines. As well as these iconic heroes, in this audio, we also see the beginnings of what will become one of the most important books in the galaxy. Performed by Gareth Armstrong, Ian Brooker and Jonathan Keeble Sound design and music by Richard Fox and Lauren Yason Running time 21 minutes Produced by Black Library