Previously in Valentin & The Widow:

It is 1924. Lady Rosewood has fled the Moore School in fear of Mrs Moore's hypnotic powers, only to be attacked by a former student. Her valet Sacha Valentin is keeping watch under the guise of a gardener, despite the unwanted attentions of the chaperone Sunna Van Sant. Meanwhile, the maid, Zodie Seacole, is the latest victim of Mrs Moore's hypnosis. She has been ordered to assassinate the United States senator Harlan Hapley.