When a 17-year-old Nottingham boy is stabbed, the only evidence is his dying declaration that there were four assailants. Nottinghamshire Police turn to their Digital Forensics Unit to sift online and phone footprints and track down the culprits.

The burnt body of a 27-year-old man is discovered in a remote nature reserve in Scotland. All forensics were destroyed in the fire, so detectives turn to Police Scotland's Digital Forensics Unit to help solve the case.

When a 13-year-old is murdered in a Reading park, the Digital Forensics Unit use groundbreaking tools to track suspects' digital footprints in a race against time to find the evidence and secure a conviction.