Aubrey Conover is a brilliant psychiatrist who heads one of the most prestigious mental health facilities in the country, but she has a secret. Her urge to kill runs even deeper than those of the violent patients she treats.

Dean Hanson is running from his dark past, but the voices in his head won’t let him leave it behind. By day he guards the criminally insane, but he spends his nights stalking the citizens of Philadelphia.

Deirdre Hanson is the lieutenant tasked with bringing two serial killers to justice, never knowing one of them is sleeping in her bed.

When these three powers converge, the battle of wits that follows will leave the city streets bathed in blood.