Surfing an online dating site, NYPD detective Kat Donovan feels her whole world explode. Staring back at her is her ex-fiance, the man who shattered her heart—and whom she hasn’t seen in eighteen years. But when Kat reaches out to the man in the profile, an unspeakable conspiracy comes to light. As Kat begins to investigate, her feelings are challenged about everyone she’s ever loved—even her father, whose cruel murder so long ago has never been fully explained. With lives on the line, including her own, Kat must venture deeper into the darkness than she ever has before and discover if she has the strength to survive what she finds there.

紐約警局的探員凱特‧達諾凡，瀏覽了線上交友網站後，發覺自己的世界正在崩解。十八年未見的前未婚夫曾經是傷她最深的人，當凱特打開他的檔案，揭發了一樁駭人聽聞的陰謀。凱特開始展開調查，她深愛的每個人所發生的事都挑戰著她的感受，甚至是她的父親，許久前父親遭遇殘酷的殺害尚未水落石出。這些人的性命正處於危險，包括她自己，因此凱特必須比以往更加深入黑暗中冒險，而她也開始懷疑，在發現一切真相後，是否還有勇氣活下去。