Just as the Space Wolves' battle against Chaos seems to be taking a turn in their favour, discord strikes the heart of the Imperial forces. In the crusade fleet, accusations of treachery fly - just how far has the dark touch of Chaos reached, and can anyone be trusted? The Space Marines are forced to put their differences aside and confront the true villain - whatever the cost, this is the only way to achieve victory over the forces of darkness.
Read it because
After seven previous instalments of Fenrisian action and Chaotic intrigue, it all comes down to this: someone in the Imperial battleforce is a traitor. But who? And who's really behind the cataclysm that has beset the Space Wolves? Only one way to find out...