Detective Inspector Vincent Ruiz has no recollection of the firefight that landed him in the Thames, covered in blood. Accused of faking amnesia, Ruiz reaches out to psychologist Joe O'Loughlin to help him unearth his memory and clear his name. Together they battle against an internal affairs investigator convinced Ruiz is hiding the truth, and a ruthless criminal who claims Ruiz has something of his that can't be replaced.
Marnie Logan’s husband Daniel has inexplicably vanished, and the police have no leads in the case. Without proof of death or evidence of foul play, she can't access his bank accounts or life insurance. Depressed and increasingly desperate, she seeks the help of clinical psychologist Joe O'Loughlin. It appears that a cold-blooded killer is eliminating the people in Marnie's life, and now that O'Loughlin is a part of it, he is next in line.
Three years after the disappearance of two teenage girls, a husband and wife are brutally killed in the farmhouse where one of the teens once lived. A troubled young man who can hear voices claims that he saw a girl that night being chased by a snowman. Convinced that at least one of the girls might still be alive, Joe O'Loughlin and Vincent Ruiz race against time to save the girls from someone with an evil, calculating and twisted mind.
When Sienna Hegarty turns up at his family home one night, covered in blood and frozen in shock, psychologist Joe O'Loughlin finds himself drawn deep into her world, trying to unearth the dark family secrets her mind has buried.