"A foreign embassy official warns the UK government of a bomb attack on London. Zoe Tampsin’s Lambeth Group team is launched into a race against time to find the terrorists. As Zoe unpicks the details, she suspects the informant didn’t tell her the whole story. With time running out, her team chase a promising lead only to have it wrenched from their grasp. Either the bombers were incredibly lucky, or they received a tip-off."