黑名册风波 The Black Book

An elderly woman discovers an old painting in her house. It turns out to be a previously unknown painting by Hogson, a famous 18th century painter. It's sold at an auction for 400 000 pounds to a collector. The same night, the woman who found it is found murdered in her home. As more and more bodies turn up, Barnaby uncovers an art forging business among Midsomer's art society.