Nothing is what it seems behind the well - trimmed hedges of the picturesque cottages in the idyllic English county of Midsomer. Beneath the tranquil surface of sleepy village life, there exists dark secrets, scandals and downright evil. John Nettles stars as the humorous, thoughtful and methodical Detective Chief Inspector Barnaby. At the Corn Exchange, preparations are in full swing for the forthcoming production of Amadeus, unaware that nearby the body of a local resident, Agnes Gray, is about to be found floating in the river. Barnaby sets out to discover who has perpetrated the crime, however, before he can conclude his investigations there is trouble at the theatre.