Eva is horrified when she witnesses an attack on her best friend. She calls an ambulance and flees, fearing for her safety. DCI Helen Lavery leads the investigation into the murder. Slowly, the pieces of the puzzle start to come together. But as Helen inches towards solving the case, her past becomes caught up in her present. Someone is after them both. Someone who will stop at nothing to get what they want. Can Helen escape her own demons as well as helping Eva to escape hers?