THE PUZZLE OF PATIENT 815A A beautiful young woman with amnesia lies in Ward 8 of Ellis Hospital, remembering nothing about where she was driving when her car plunged over a cliff—or the identity of the dead child in the backseat. Naming the anonymous patient Mathilde, Nurse Adele Monsarrat calls on her psychiatrist ex-lover to help the crash victim recover her shadowed past. Yet someone is determined to keep Mathilde silenced as a threatening presence infiltrates the dark hospital halls—while outside in the community, four people are brutally murdered in what appear to be professional hits. Then the police uncover disturbing connections between the victims—and Mathilde—forcing Adele into a hot zone of terror, where ruthless violence spreads like a disease no doctor can cure...