Miss Dinah Ashmore has a problem: her sister has gone missing, and the constable isn’t taking it seriously. She decides to take matters into her own hands by hiring a Bow Street Runner, not understanding the danger she has put herself in. Nathaniel Calvert, Earl of Hawthorne, is an agent of the Crown. His assignment is to root out a radical group and bring them to justice. When Miss Ashmore mistakes him as a Bow Street Runner and explains her plight, he suspects that the missing sister might be connected to his case.

Miss Lizette Kent's life is in shambles. Not only did her mother just pass away, but she has been left without the means to provide for herself. While she is contemplating her future, she encounters an unexpected and vexing man: Tristan Westcott, a man that mistakenly seems to believe that she is the daughter of an earl, despite her insistence that she is not.

When Lady Margaret Blake and her sister lose their parents in a boating accident, they are left to the guardianship of their uncle. Disregarding their feelings for the price their beauty will fetch on the Marriage Mart, he arranges a match for both. Lady Margaret, however, takes her fate into her own hands. Returning home after war to assume his responsibilities, Luke, Duke of Waverley, expects a nice, quiet life on his country estate. Within hours of stepping foot in England, though, he stumbles upon a young woman being attacked, and no sooner does he rescue her than she runs away. 

Lady Julie has dreamed of marrying her childhood sweetheart since she was four years old. Unfortunately, her father has other plans. He has his sights set on her marrying an earl. When she is forced into an unwanted betrothal, Julie needs to make a choice: wait for her true love and destroy her honor, or make a deal with the forbidding earl. 

Marianne Edgewood is perfectly capable of running Brindale Castle, if only the task would be left to her. A centuries-old house of stone is solid, unchanging, whereas people are not to be relied upon. It matters little that a stranger inherited the castle. She must simply find a way to stay.