Series BBC- NR- Tony (James Nesbitt) and Emily (Sasha Waddell) Hughes' life changes forever when their five-year-old son, Oliver, mysteriously disappears during a family holiday in France, triggering an obsessive, years-long manhunt. Tchéky Karyo plays the French detective who heads the team and even when he retires, he continues to help Tony follow up on clues to their boy’s disappearance. Emily is devastated and cannot withstand the strain of the investigation, eventually having a break down and ultimately leaving her husband. Intense and unrelenting, Tony will never let go of the hope of finding his young boy, despite the toll it takes on others’ he loves and his own life. Gripping.