In the sweltering summer of 64 AD, Rome is a powder keg of political tension and crushing inequality. Cassia, a brilliant female structural engineer forced to draft her designs in secret, investigates the suspicious collapse of a plebeian apartment block. She uncovers a terrifying conspiracy: a synchronized arson plot orchestrated by the highest echelons of power to burn the slums and clear land for a new golden palace. Teaming up with a disillusioned Roman firefighter, Cassia must navigate the deadly labyrinth of the Subura and the catacombs beneath the Circus Maximus to stop the empire’s ruthless elites before the eternal city is reduced to ashes.