Miss Farnaby has been in a foul mood ever since her sister, Adele, left Farnaby Manor. No matter what Mulberry tries to say or do, she refuses to budge one inch from her slump of depression. What's worse is that she has started to become belligerent and abusive to both Bert and Alice, criticising their work at every turn. What – if anything – can break her out of this rut?