A true scientific and legal thriller with a perfect twist. In April 1984, a young British DNA scientist was sexually assaulted in her San Francisco cottage. A year later, and hundreds of miles away, she was brutally murdered. The alleged rapist, an American financial analyst, was the only suspect. Police and forensic experts, however, failed to link him to the crime; the case was filed unsolved. Fifteen years later, a detective reopens the case, and using the newest DNA techniques, she finds a vital clue...