The Galaspar system suffered for years under the heel of the cruel Regime. Billions of people worked for the endless enrichment of their masters, dragging out a miserable existence in dirt and fear. But Galaspar’s sins were not overlooked by the Imperium, and Death itself sentenced the Regime to destruction. Mortarion, recently appointed commander of the XIV Legion, carries out a massacre on the planet of unimaginable scale—so terrible it horrifies the Imperium. Wanting to understand what happened, two noble Primarchs arrive on Galaspar to call their brother to account. But the Pale King has no intention of tolerating accusations, because every swing of the scythe always gathers a harvest.