Caelen McDowell, last heir to a disgraced line of alchemists, is a gilded prisoner of a fanatical religious empire. To escape execution, he must embrace his forbidden heritage and orchestrate a public murder. But his plan is overseen by the one man he can't fool: a beautiful, ruthless Inquisitor whose own faith is beginning to crack. Hunted and desperate, they are forced into an unholy alliance, discovering a conspiracy that could either liberate the city or drown it in blood and fire. Survival is no longer enough; now, they crave revolution.