Hoping to find solace from the demons that haunt her, Vail makes her first trip to the Napa Valley. But shortly after arriving, a victim is found in the deepest reaches of the exclusive wine cave, the work of an extraordinary unpredictable serial killer. From the outset, Vail is frustrated by her inability to profile the offender-until she realizes why: the Behavioral Analysis Unit has not previously encounter a killer like him. With the killer’s...

Agent Karen Vail has the opportunity to work on catching a serial killer she'd encountered once before when she was new to the NYPD. That case has haunted her for the past twenty years and she hopes she now has the skills, as an FBI profiler, to find and stop the murderer.