Gotrek Gurnisson barges into Greywater Fastness seeking answers as to why his Fyreslayer rune is mysteriously waning. But finding them in the stronghold's clogged and blackened arteries may prove far more difficult than first thought, and with skaven warlocks building something deep underground – something that will cement their place in skavendom forever – Gotrek begins to wonder if he might instead find that which has eluded him these past ages – his doom.