Following the destruction of the City of Mercy, an ancient god has been resurrected and sealed inside Beru's body. Both are at the mercy of the Prophet Pallas, who wields the god's powers to subjugate the Six Prophetic Cities. But every day, the god grows stronger, threatening to break free and sow untold destruction. Meanwhile, far away from Pallas Athos, Anton learns to harness his full powers as a Prophet. Armed with the truth about how the original Prophets killed the god, Anton leads Jude, Hassan, and Ephyra on a desperate quest to the edge of the world. With time running out, the group's tenuous alliance is beset by mounting danger, tumultuous romance, 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.