On a train journey, Saki meets Mrs De Ropp, an oppressive aunt and guardian to an unruly brood. Inspired by the meeting, he imagines a tale of repressed children who find solace in their childish wonder, and are saved by their imagination.

The peacefulness of the Midsomer community is shattered by violent crimes, suspects are placed under suspicion, and it is up to a veteran DCI and his young sergeant to calmly and diligently eliminate the innocent and ruthlessly pursue the guilty.