Back on board the Tempestuous, the team experiences powerful dreams of the xenos facility they left behind. Two weeks into the journey, the crew is alerted to dangerous fluctuations of the Gellar Field, just before an enormous group of hullghasts erupts from the lower decks, capturing or killing the Chapter serfs and making off with Inquisitor Bellin (who is being held in a chemically-induced coma by Galdroon).
The team tracks the hullghasts back to a make-shift shrine, centered around a sort of throne built from scrap and equipped with sophisticated life support machinery. They were in the process of installing Bellin into the throne device when the team arrives. They kill off the mutants and their blasphemous cardinal and rescue the Inquisitor.
The team then learns that the hullghasts had damaged two of the ship’s Gellar Field generators, which had to be repaired before the ship was exposed to Warpspace.