The Atonement of Fire

Imperium Secundus is over. A vision granted to Sanguinius shows that the Emperor is alive, and so the Triumvirate of primarchs who formed the breakaway empire have taken to their fleets and intend to make the traitors pay for their heresy. But in his heart, Roboute Guilliman, architect of Imperium Secundus, feels as much a traitor as any of them – and he seeks to atone for his sin by throwing himself at enemies. When a force of World Eaters threaten a world that embodies the Imperium's ideals, he finds the perfect target…