When a young man breaks into South Oxford Nursery School with a gun, and takes a group of hostages, teacher Louise Kennedy is fearful. But Jaime Segura isn't there on a homicidal mission. Bad Sam Chapman – head of the intelligence service's internal security force, the Dogs – tries to find out what Jaime is after. But the only person Jaime will talk to is Ben Whistler, an MI6 colleague of Jaime's lover, Miro – who has gone missing with a quarter of a billion pounds…