In the hellish close confines of the space hulk Gallowdark, elite kill teams stalk each other through haunted corridors. Millenia ago, an Imperial Inquisitor and a regiment of loyal Cadian Kasrkin recovered an ancient xenos artefact, but their ship was lost in the warp and fused with the colossal floating mass of Gallowdark. Only a few years have passed for the Kasrkin survivors trapped within its time-bending mass, though thousands have gone by in the galaxy outside. Now, the Necron owners of that relic have awoken from eons of slumber – and Technomancer Hamanet the Relentless of the Tsarakura Dynasty will stop at nothing to reclaim his lost creation.