An unexpected menace threatens their newfound freedom…

Acquitted of the crime he was accused of, Adrian Croft begins an investigation that could link a duke to his sister's death. But with a fresh series of murders leading straight to Saint George's Hospital, Adrian is torn between his quest for revenge and the need to catch an active killer. For though he may have sworn to yield his power in order to gain a pardon, all bets are off when villains threaten his city.

Having proven her unfailing loyalty to her husband, Samantha Croft settles into married life - an idyl that quickly crumbles when she and Adrian get caught up in a new series of murders. As they follow a trail that leads them through subterranean tunnels and to a secret organization, they face another threat too: a ghost from Adrian's past who's about to bring war to their doorstep.