Pursued by vengeful eldar, Magos Kotov's Explorator armada heads into a newly revealed area of space in pursuit of ancient secrets. As the Adeptus Mechanicus forces and Black Templars Space Marines tackle the twin threats of the wrathful aliens and insurrection aboard the fleet, a greater danger reveals itself.

The fifth novel in Abnett's series finds the troops taking part in an all-out attack on the cities of Phantine. But the helpless are being murdered and one of Gaunt's own men may be responsible. Original.