Yvraine of the Ynnari and the mysterious Visarch lead a host of warriors on a quest to steal the Hand of Darkness, a relic of pure evil. Its loss would see the powers of Chaos diminish, and strike a blow for the aeldari and their allies in the Imperium. Obtaining this dread artefact will not be easy. Yvraine must first gain the favour of the Black Library in order to pass through the Realm of Chaos and overcome its daemonic denizens. Only then will she have any hope of reaching the hiding place of the Hand, the Whisperin Tower of the Primarch Mortarion...