One of psychotherapist Cassidy McCabe client's undergoes a flashback to a childhood experience in which she witnessed a Satanic ritual in a forest preserve outside Chicago on the day McCabe's cat turns up missing.


Cassidy McCabe-thirty seven, divorced, struggling to establish a private practice-is uncertain whether to take the suddenly recovered memory as reality or delusion. But when, in an unguarded moment, she tells the story to her partner in crime solving, investigative reporter Zach Moran, he recognizes the place Dana described and insists on searching for evidence.


While Cassidy is reluctant to go digging into her client's past, Zach argues that Satanism and old murders cannot be ignored. Dana becomes increasingly disturbed, a strange new client add to Cassidy's unease, and Zach develops a pattern of disappearing on Saturday nights. As her cat returns to start a blissful pregnancy, the evil that emerged deep in the forest moves closer, Cassidy begins to fear, not only for her client's life, but for Zach's and her own as well.