Inspired by the real-life events that occurred on November 26, 1983, this series follows what happened when six armed men broke into the Brink's-Mat security depot near Heathrow Airport in London and inadvertently stumbled across £26m worth of gold bullion.

What began as a typical Old Kent Road armed robbery became a seminal event in British criminal history that at the time was the world's biggest ever theft. The disposal of the bullion triggered large-scale international money laundering; provided the dirty money that helped fuel the London Docklands property boom; united blue- and white-collar criminals; and left a trail of controversy and murder.