The inside story of the biggest ever joint law enforcement operation against a global network of organised crime groups who believed their encrypted phones were safe. For 74 frantic days the authorities could read all the messages and sought to save lives and bring down the gangs, before the criminals realised that their data was being captured.

As the National Crime Agency team mobilise to find the mole within their team, word gets out that there has been a fatal development in the investigation in the Netherlands. A leading crime journalist, Wouter Laumans, is quickly on the case. The murder victim is a very close friend of the crime boss who has built the torture chamber. The authorities fear a terrifying escalation when they uncover a plot to kidnap his enemy's family in revenge. It becomes increasingly clear that the authorities will soon have to reveal their hands if more deaths are to be avoided.