Mystery fiction. London, 1875. At Lady Cornford's famous soiree (sugared almonds and tittle-tattle) everyone is gossiping about Henry Ellis Margam's latest hit, The Widow's Secret. Only a few people know that one of Lady C's guests, the enigmatic Bella Wallis, is in fact the bestselling novelist. Bella punishes evil-doers by exposing them as thinly-disguised characters in the books she writes under her male pseudonym. Armed with her pen, the handsome Miss Wallis surrounds herself with useful men: the dashing Philip Westland, possibly a government spy; Captain Quigley, Bella's fixer, and his shady assistant, Murch, who can always crack a bone or two when someone needs persuading. Westland comes to Bella with a problem: his best friend Kennett is smitten by the heiress Miss Mary Skillane. But Mary's father, Sir William is 'an old fraud with a beautiful daughter' and she has been promised to Robert Judd, a vulgar treasure seeker. Mary is due to inherit the Skillane pearls, currently residing in a red lacquer box in a Cornish bank vault.