The first of a two-part documentary featuring unprecedented access behind the scenes of a crime investigation into a serial rapist who Cambridgeshire Police believe preyed on dozens of women. The suspect, Craig France, has a reputation across Peterborough's nightclub scene and for the notorious hot-tub afterparties he has hosted at his house. A search of France's house reveals an obsession with hidden recording devices. As officers download the data from the cameras, what they find shocks them.

The inside story of the investigation into the disappearance of a 15-year-old boy. A mum calls Bedfordshire 999 reporting that her 15-year-old son has gone missing, again. DC Lee Primonato from the dedicated Guns & Gangs unit immediately suspects that yet another child has been drawn into serious drug dealing and that the boy will, eventually, be found in a drug den. Recruiting children to hold a phone where drugs are ordered by customers has become an essential part of gangs' business model; because it makes it harder for the police. Cameras follow detectives as they make a breakthrough. Every twist and turn of the investigation is on camera as a raid is planned on a property where the police hope to find the controller of the drug line but the detectives are in for an unpleasant surprise.