A missing convict, a young woman assaulted and killed, an old man murdered in his home. All in different parts of London. With eight million inhabitants, bad things happen to good people all the time. Only nine-year-old Cassie Janus knows there's a connection, because she is the killer ... in her nightmares at least. Cassie has the rare ability to unearth the darkest emotions of others. She sees a past they would rather keep hidden and a future too horrific to comprehend. Perhaps the killer can be stopped. If only she can make someone - her mother, her friend, her teacher - believe. Her words are dismissed, her sanity questioned. She knows they'll believe her in the end ... but by then, they'll be facing death. Can she act to save them, or will their fate be left to chance?