When extremists kidnap two seven year-old boys from very different backgrounds and promise to release them only if their radical demands are met, the case falls into the hands of the intuitive and pragmatic Iain Barclay. Faced with a relatively inexperienced and increasingly unreliable team, Barclay soon calls his firm friend and faithful deputy Amy Foster out of early retirement and away from the bottle to support him in solving what emerges to be a highly sensitive crime.