Commander O'Shaserra, called Shadowsun by the elemental castes of the T'au Empire, is known across the Chalnath Expanse as an ice-cold military genius. She is the master of the stealth battlesuit assault and the Kauyon metastrategy - that of the Patient Hunter. But how to lay a trap for the Chaos-worshipping warriors of the Death Guard, whose ancient technology allows their fleet to rip holes in space? And how to deal with their daemonic patrons, who defy the laws of physics and shatter the logical methods that Shadowsun holds so dear?