The British government are brokering a secret deal with the Saudis, selling nuclear power to secure their future oil supply.
Intelligence suggests that one of the Saudi Princes has links with Al-Qaeda and might want to sabotage the deal, so Ros goes undercover with the Saudi royal family.
Events take a terrifying turn when the Saudi embassy is stormed and Ros is taken hostage. Can she communicate with her team and help them unravel one of the most complex terror plots they have ever faced?