A distressed woman arrives at Luton Police station. She is comforted by officers from Bedfordshire Police's Safeguarding Unit, but they have to reveal that her 76-year-old husband is under arrest and in custody following allegations of historic child sex abuse, dating back to the 1970s. Since the Jimmy Savile case, the police have been overwhelmed with claims of child sex abuse but they feel duty-bound to seek justice for the victims, no matter how long it has been delayed. Cameras follow every twist and turn of the investigation as the detectives work out if they can believe the allegations, and whether they can ever find the evidence to build a case. This is real-life drama at its most intense.