A rumor without proof is a blade without a hilt.
Amara and Soren survived the horrors of the Ashen Woods, but the truth they brought back is a death sentence. The Aegis fortress has been infiltrated by an ancient shadow cult, and exposing the treason means certain execution.
Their only weapon is deception. Hiding in plain sight by playing the role of broken, traumatized survivors, Amara and Soren begin a lethal game of espionage against the very instructors who trained them.
As the claustrophobic danger mounts, the magnetic pull between them erupts into a fierce, uncompromising bond. But a catastrophic plot is ticking beneath their feet, and to save the keep, they must master the forbidden fusion of their magic-or burn with the fortress.