Lisa walks in the woods on a regular basis. But this time when she emerges, she is badly injured. Her wedding ring is missing. And her memory of the event is blank.   Unsettled, she tells her husband that she was mugged by a young girl but insists he not call the police. It doesn’t take long for fragments of the truth to come back, though, and when Lisa realises that she was assaulted by a man and left to die, she begins to live in fear, seeing threats everywhere she looks. What if he comes back for her—and she doesn’t even recognise him? Even co-workers and neighbours could be suspects . . .   Soon, Lisa discovers she is not the only victim and becomes fixated on pursuing the perpetrator. But is she really prepared for the horrifying truth she is about to discover?