Following the destruction of the City of Mercy, an ancient god has been resurrected and sealed inside Beru's body. But both are at the mercy of the Prophet Pallas, who wields the god’s powers to subjugate the Six Prophetic Cities.

Meanwhile, far away from Pallas Athos, Anton learns to harness his full powers as a Prophet and discovers the truth about how the original Prophets created a weapon capable of killing a god. Along the way, the group’s tenuous alliance is threatened by mounting danger, impossible romances, and most of all by a secret that Anton is hiding: a way to destroy the god at the price of an unbearable sacrifice. But the cost of keeping that secret might be their lives - and the lives of everyone in the Six Prophetic Cities.