Dan Abnett's new Warhammer 40,000 novel is a gripping tale of the heroic destinies of military pilots facing almost certain defeat. The new crusade, which spanned several planetary systems, required countless sacrifices from the inhabitants of the Sabbat Worlds. The Imperial planet Enosis is brought to the brink of complete destruction, as its own armed forces were unable to withstand the onslaught of Chaos mutants who carried out a bloody massacre in the name of their terrible gods. The fighter pilots of the elite units of the planet Fentyne are well aware that fulfilling their ally duty can cost them life. Enosis's squadrons suffer heavy losses, and the demoralized locals, facing the advancing forces of Chaos, place their last hope in the pilots. Will the pilots be able to justify them and, gaining precious time, hold back the advance of the dark forces until reinforcements arrive from other worlds? Can they hope to win in soul- and body-wrenching aerial battles against an enemy led by demons?