Sebastian Sayre and Kyra Valorian, the former Felserpent King and Queen, thought they knew what reuniting the divided realms of Aeles and Nocens would require of them. But fulfilling their promises to stop Tallus and bring peace between those with silver and gold blood will require sacrifices they didn't expect to make.

Furious over Kyra's refusal to help him turn Daevals into Astrals, Tallus assumes control of Aeles and announces he's developed a weapon capable of killing everyone with silver blood. Kyra discovers a way to defeat him, but it will require her to perform a terrible act she isn't sure she can live with. Sebastian loathes becoming a recognized public figure, and given his dark past, there are those who don't trust him to hold a position of power, even as he and Kyra race to reunite the realms.

Filled with old friends and new allies, devastating betrayals and surprising revelations, this heart-pounding conclusion to the Felserpent Chronicles ends where it began: in the grey waters of Death. Controlling the past might change the future, but will saving their world cost Sebastian and Kyra the very bond that binds them across time?