Beyond the Empire and within it, the threat of war looms ever larger. The Blood Shrike, Helene Aquilla, is assailed on all sides. Emperor Marcus, haunted by his past, grows increasingly unstable, while the Commandant capitalizes on his madness to bolster her own power. As Helene searches for a way to hold back the approaching darkness, her sister's life and the lives of all those in the Empire hang in the balance.