DCI Barnaby and Sgt. Scott investigate when John Ransom is found murdered with suspicious burn marks to his head. The investigation leads to two feuding families of Midsomer Mere, one with the ability of second sight, and the battle between faith and science.

When the naked body of Dexter Lockwood, a rival executive at Fieldway Foods, is found in the Plummer & Son factory bottle steriliser, DCI Barnaby and Sgt. Scott's investigation uncovers a multitude of secrets and lies among the entire Plummer family.