Reunited with their old friend, the insane dwarf engineer Malakai Makaisson, Gotrek and Felix travel once again on his mighty airship The Spirit of Grungni as they head north to join in the war against the vast hordes of Chaos that threaten the lands of men. But when a series of suspicious accidents threaten to end their journey prematurely - and permanently - it becomes clear that saboteurs are at work. Gotrek and Felix must work quickly to find the culprits before it's too late.

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Old friends and new challenges await the infamous duo as they try to unravel a mystery (not their strong suit they're better at fighting than thinking) that threatens to destroy them and doom thousands.