Agatha Christies Marple. The Secret of Chimneys (2010)

http://www.imdb.com/title/tt1511429/



Miss Marple finds herself spending the weekend at Chimneys, the stately home of Lord Caterham whose late wife was her cousin. The weekend has something of a diplomatic air to it as the Austrian Count Ludwig von Stainach is also there to negotiate a trade agreement with the British that will give it access to iron ore. Chimneys was once the 'in' place to be for a fancy weekend but over many years, it has become somewhat run-down. Except for a maid who disappeared with a valuable diamond in the 1920s, not much of note has happened there for a long time. Everyone is surprised when Count von Stainach says that in addition to signing the trade agreement, he also wants to purchase Chimneys. Lord Caterham's eldest daughter Bundle is dead set set against the idea but it all takes a very serious turn when the Count is found murdered. There are several suspects and another member of the household will die before Miss Marple solves the crime.