A Lady of Quality(1924)

Clorinda Wildairs breaks off an affair with the unscrupulous Sir John Ozen to become engaged to a rich nobleman, Mertoun, the Duke of Osmonde. Clorinda accidentally kills Sir John when he, infuriated by her forthcoming marriage, threatens to blackmail her. She buries the body in the cellar and admits her act to the forgiving Osmonde before marrying him.