When Osama Bin Laden is tracked down and killed by the Navy Seal operation in a highly protected compound in Pakistan, it's obvious there was a leak from within. After the source is revealed to be students Malik and Chaudhry—ex-Islamic fundamentalists recruited by MI5 to disguise themselves as British terrorists—they are immediately under threat from al-Qaeda, who have sent an assassin to torture and kill anyone they suspect to be the traitor. With the assassin closing in, Shepherd is drafted in to teach the pair how to survive undercover, but it's a major challenge. Spider is used to playing undercover cop, not the handler. And when Malik and Chaudhry are recruited to stop a Muslim extremist group's terrorist attack on a London shopping center, he is forced to lie to them about the danger they are in. With his loyalties split, can he protect them before it's too late?