David Murdoch, a prison officer grappling with loss and living quietly alone, finds his carefully constructed world shattered when his adult daughter, Lucy – who's expecting a child – becomes the target of a terrifying threat. It all begins with a routine hospital visit; tasked with escorting inmate Jules Hope after she falls ill, Murdoch receives a chilling phone call: to ensure Lucy’s safety, he must break Jules out and deliver her into the hands of someone holding his daughter captive. Silence means death for Lucy – a devastating ultimatum that leaves him no choice but to comply. But as events spiral beyond control, Murdoch is forced off script, taking desperate action to protect the one person who matters most. Now, relentlessly pursued by DS Susan Reinhardt, he’s caught in a frantic race against time, desperately trying to outrun the law and save his daughter's life.