Back then, the Galaspar system suffered under the brutal regime of the Order. Billions of people worked endlessly to enrich their masters, living out short lives in poverty, squalor and fear. But the sins of Galaspar did not go unnoticed by the Imperium, and Death itself condemned the Order to destruction. Mortarion, recently elevated to head of the Death Guard, descended into the world and with him came carnage on a previously unheard of scale. The brutality of Mortarion's campaign shocked the Imperium. Seeking to understand the horrors that had been committed, two noble primarchs came to Galaspar to hold their brother accountable for his actions. But the Pale King tolerates no objection to his methods, for when the scythe falls, it reaps a terrible harvest.