Harry has agreed to help the British Government secure a deal with Saudi Arabia, set up by British cabinet minister Daniel Wise. The deal would mean that Britain will provide the Saudis with nuclear technology in return for a guaranteed oil supply to Britain for the next 20 years. MI6’s Saudi expert is drafted in to support the MI5 team. Intelligence suggests that one of the Saudi Princes has links with al-Qaeda and might want to sabotage the deal, so Ros goes undercover to identify which of the Princes is responsible.