When magistrate Patrick Colquhoun orders a habitual thief and ne'er-do-well transported to Botany Bay, he doesn't realize a 14-year-old boy has been left behind to follow in his father's footsteps - not until young John Pickett is hauled into Bow Street for stealing an apple from the produce market at Covent Garden. Feeling to some extent responsible for the boy, Mr. Colquhoun prevails upon Elias Granger, a prosperous coal merchant, to take him on as an apprentice.

Having resigned his position at Bow Street, John Pickett waits in vain for someone - anyone! - to engage his services as a private inquiry agent. As weeks go by with no responses to his newspaper advertisement, he has taken to spending his days wandering idly about London rather than admit his failure to his wife.

Hours later, the man’s cold body lies in the city mortuary, alongside the woman he couldn’t save. And his sister, unconventional nurse Gemma Tate, tracks down troubled police inspector Sebastian Bell to unravel the truth. Sebastian has enough pressure to solve the murder of an aristocratic heiress without Gemma meddling in his case. But the cryptic sentences she brings him from her brother’s notebook could be a crucial lead. If only they knew what “milky way” meant.

Margaret Darrington is no stranger to genteel poverty herself, since the death of her father has left her in charge of her two younger siblings and feather-brained aunt. But Margaret has a plan: To salvage the family's finances, she has only to put her beautiful younger sister, Amanda, in the way of marrying a wealthy man - perhaps the new Duke of Montford, who is expected to arrive any day. 

Cavalry captain Gabriel Lacey returns to Regency London from the Napoleonic wars, burned out, fighting melancholia, his career ended. His interest is piqued when he learns of a missing girl, possibly kidnapped by a prominent member of Parliament. Lacey's search for the girl leads to the discovery of murder, corruption, and dealings with a leader of the underworld.

The Earl of Wrexford possesses a brilliant scientific mind, but boredom and pride lead him to reckless behavior. He does not suffer fools gladly. So when pompous, pious Reverend Josiah Holworthy publicly condemns him for debauchery, Wrexford unsheathes his rapier-sharp wit and strikes back. As their war of words escalates, London's most popular satirical cartoonist, A. J. Quill, skewers them both.

Richard, Lord Ramsay, has been brought up from the cradle with a consciousness of his duty to his family and his name. His sense of responsibility has led him to install two elderly aunts in the Dower House; educate his cousin Peter Ramsay and employ him as a steward; and provide a home for poor relation Jane Hawthorne, who once served as his mother's companion.

Librarian Sylvia Ashe knows nothing about her past, having grown up without a father and a mother who refused to discuss him. When she stumbles upon a diary that suggests she's descended from magicians, she's skeptical. After all, magicians are special, and she's just an ordinary woman who loves books. She seeks answers from a member of the most prominent family of magicians, but she quickly learns that finding the truth won't be easy, especially when he turns out to be as artless as her, and more compelling and dangerous than books.

London, 1880. Kat Holloway, highly sought-after young cook to the wealthy of London, finds herself embroiled in murder when she’s accused of poisoning her employer, the loathsome Sir Lionel Leigh-Bradbury. Her only help as she works to clear her name comes from the mysterious Daniel McAdam, a handsome man-of-all-work who seems to know everyone and always happens to be in the right place at the right time.

December 1899. After the death of her beloved grandmother, Cleopatra Fox moves into the luxury hotel owned by her estranged uncle in the hopes of putting hardship and loneliness behind her. But the poisoning of a guest on Christmas eve throws her new life, and the hotel, into chaos. Cleo quickly realizes no one can be trusted, not Scotland Yard and especially not the hotel’s charming assistant manager.