Destiny demands sacrifice.

With Prince Kaius holding three of their friends for ransom, Astrea and Varojin wearily rally the team for a treacherous rescue mission. But when their quest turns into a violent confrontation, Astrea and her friends question how much void magic the Emperor really has under his control.

Amid the rebellion's growing efforts to thwart both the Emperor and the Paragon, Victor Nazarov retaliates with quick and violent action, leaving both Astrea and the continent at large reeling. Finally out of their depth, Astrea and Varojin seek new allies, but not everyone is willing to trust the Emperor's rebellious children.

With news that the Emperor is sitting on a large cache of aetherium, the group must venture back into Helosia to prove their loyalty to the cause. But in doing so, they place themselves in greater danger than ever before-a danger that won't be outrun again.