Grace Blades is a master psychologist, respected by her peers and adored by her patients. She is hardworking and highly competent, a model of self-control. But in private, Grace indulges a secret thrill-seeking darkness, pursuing danger as an escape from the regimented life she's established. Closing her eyes as she flies down the Los Angeles freeway or targeting a stranger in a hotel bar for an anonymous moment of passion, Grace craves the rush. Order by day, danger by night - the double life helps her cope with memories of a traumatic childhood, in which Grace saw her mother stab her abusive father before turning the knife on herself. But her two worlds collide when a new patient turns out to be her random conquest from the night before. He pleads for her to take him on anyway, claiming a unique connection with the foster father who raised her. She refuses. The next day, his body is found by police with only her business card to identify him. Suddenly, Grace is plunged into a web of danger and deceit that will draw her back into the dark past she fought so hard to leave behind.