Portland detective Archie Sheridan spent years tracking Gretchen Lowell, a beautiful and brutal serial killer. In the end, she was the one who caught him…and tortured him…and then let him go. Why did Gretchen spare Archie's life and then turn herself in? This is the question that keeps him up all night―and the reason why he has visited Gretchen in prison every week since. Meanwhile, another series of murders is tearing up the Portland streets. Archie seems to be getting closer to solving this high-profile case…until he finds himself in a fatal collision course with the killer―one that inevitably leads him back to his former captor. Gretchen may be the only one who can help do justice. The only thing she can't do, this time, is save Archie's life.