Amber Hewerdine suffers from chronic insomnia. As a last resort, she visits a hypnotherapist, doubtful that anything will really change. Under hypnosis, Amber hears herself saying, 'Kind, cruel, kind of cruel.' The words awaken a vague memory, but she dismisses the whole episode as nonsense. Two hours later, however, Amber is arrested for the brutal murder of a woman she's never heard of, and the only way she can clear her name is by remembering exactly where she's seen those words.