Twenty million in diamonds missing. Kate Sawyer, a cop in witness protection, holds the key. If she could only remember. Early-onset Alzheimer’s clouds the past. Stem cell therapy is working to clear it. But time is running out for Kate. One night she finds a dead man in her bathtub with a note stuck in his pocket. I know what you’ve done. Her cover blown, Kate runs, the clock is ticking. People close to her are being killed. Shadowy memories tease her. Some she recognizes. Others don’t seem familiar at all. Running from people she can’t remember, dogged by a past lost in the haze, Kate discovers no one is who they appear to be, perhaps not even herself.

On the best day of Dr. Rita Davenport’s life, she jumps in front of a speeding London Underground train. The police think suicide. Dr. Davenport’s team in Portland, Oregon thinks otherwise. On the day she died, Dr. Davenport presented a paper highlighting a medical breakthrough that would change the treatment of Alzheimer’s. The breakthrough would undercut the billion-dollar Big Pharma business model, taking money from the grant writers, researchers, doctors and huge pharmaceutical companies who have made their life’s work developing drugs that don’t work. To Dr. Davenport’s team, that is motive for murder. They turn to Detective Kate Sawyer, one of their own—a participant in their study who is battling her own genetic form of Alzheimer’s. With her lover, Detective Beck Hudson; Dr. Davenport’s right-hand man, Thea Janeway; and Thea’s romantic nemesis and respected denizen of the Dark Web, Carter Livingston, Kate gets pulled deeper and deeper into the secret places where those on the fringes of synthetic biology ply their trade…for good and for ill. The killer threatens to kill to another of Dr. Davenport’s study participants unless Kate backs off…and he’ll keep killing until she stops. With lives in the balance, Kate can’t stop…not until the last man falls. But who will be next?