On December 16, 1999, three events occur to change Jack Lewis forever. None was more devastating than the loss of Catherine, his brilliant wife. The police call it murder, but they have no suspects, no clues. Jack hires Julia Marshant, an ex-FBI agent, and gives her two weeks to find Catherine's killer. Julia, being a professional, is puzzled as to why the case needs to be solved before the new millennium arrives, and Jack has no intention of sharing his dark secret with her. Thus begins the quest to unravel the mosaic of Catherine's Code.