They were daughters of a monster—a father who slaughtered eight prostitutes before dying himself. Dr. Adeline Glen left the nightmare behind, and now she specializes in pain management. Her sister, Shana Day, followed in her father’s violent footsteps, first killing at age fourteen and being incarcerated for more than twenty-five years. After a brutal attack, Boston Detective D. D. Warren needs Adeline’s professional help to recover physically. But when a new psychopath known as the Rose Killer begins a reign of terror, D.D. must also consult the insane Shana—who claims she can help catch the madman. D.D. may not yet be back on the job, but she is back on the hunt. Because the Rose Killer isn’t just targeting lone women; he is targeting D.D. And D.D. knows there is only one way to take him down.…

她們是魔鬼的女兒，那位兇殘的魔鬼父親在結束自己生命前，屠殺了 8 個妓女。艾德琳‧格藍博士拋開那場惡夢，現在專攻疼痛治療。她的手足莎娜‧蝶則追隨父親腳步，走上殘暴一途，14 歲就殺了人，後來坐牢超過 25 年。波士頓有位名叫 D. D. 華倫的偵探，在一場殘忍攻擊後，需要艾德琳專業的協助才能完全康復。但又有個新的精神病罪犯出現，人稱殺手羅斯，恐怖開始蔓延。莎娜說她有辦法幫忙抓到那個瘋狂殺手，D. D. 因此向瘋狂的莎娜求助。D. D. 或許還未能回到工作崗位，不過她已開始進行搜索，因為殺手羅斯瞄準的對象不只有單身女性，D. D. 也是他的攻擊目標，而 D. D. 知道制伏他的方法只有一個……