After four years in a coma following a near-fatal car crash, Meg Winter suddenly, miraculously, regains consciousness. But as she begins to pick up the pieces of her life, one area of the past remains a mysterious, impenetrable blank. She has no memory of the crash, no idea how she came to be in a car with a man whose name means nothing to her - and no idea why he was murdered at the roadside while she was left for dead. But someone, it seems, is very concerned that her memories might return. Suddenly Meg finds herself in a deadly race against time to solve the mystery of that fateful night four years ago and discover why her memories are so dangerous - before someone puts her back to sleep forever.