Tanya DuBois doesn't exist. At least not after an accident leaves her husband dead and thrusts her into the uncomfortably familiar position of Suspect No 1. She has only one choice: run. But as 'Tanya' watches her life recede in the rearview mirror, we realise she was never real to begin with. And neither is Amelia Keen, Debra Maze, Emma Lark, Sonia Lubovich, or a girl called only Jo. Or almost any of the things she tells us about herself, her past or where she is going next. She is 'Amelia' when she meets Blue, another woman with a life she'd rather not discuss, and thinks she's found a kindred spirit. But as the body count rises around them their pasts and futures begin to clash.