The chilling conclusion to the award-winning Things Unseen romantic thriller series 

He’s forced to make an impossible choice—and the deadline is deadly. 

Dr. Cornelius O'Brien brought his new girlfriend, psychotherapist Neve Keane, to his home country of Ireland for a romantic getaway. There’s just one thing they need to do first: a personal favor for the President of the United States.  

It was supposed to be simple: check on the president’s goddaughter, who is struggling with a strange medical problem while studying abroad in Cork City. But with every step, Neve and Cornelius find themselves first slipping, then plummeting toward a terrifying, clandestine world at the abyss of human suffering. 

Trapped by malicious forces he can't escape, Cornelius must make a terrible choice: violate the Hippocratic oath or put Neve in imminent danger. Left in the dark, Neve faces her own perilous dilemma: honor her promise to Cornelius or act quickly to keep an innocent young woman out of the hands of vicious murderers.  

With no good options, they are forced to act. Meanwhile, the patient is prepped... and the clock is ticking.