Mark Morrison, a San Francisco homicide detective, battles with himself when his sworn duty requires he arrest his lifelong friend, after the evidence points to him, suggesting he is a serial killer. His friend relates to him certain facts only the murderer would know...How can he solve his dilemma and still remain an officer of unimpeachable honor? Alex Roth, a successful attorney, begins to doubt his sanity due to periods of unaccountable time gaps during which he witnesses acts of brutal murder as they happen. "Am I the culprit?" he asks himself. Unraveling this plot leads to an intriguing mystery.