Much to her father's dismay, Miss Amelia Buxton aspires to become a spinster, just like her eccentric aunt. Growing up with parents who married for every reason but love, she has never seen a joyful marriage. When Amelia requests a summer trip to the legendary waters of Brighton, her father allows her the excursion, but with one requirement: She must return engaged, or agree to the proposal of the man of his choosing.  

When Miss Henrietta Dixon wants something, she finds a way to have it. When an incident in London sends her and her sister to Bath, she can think of no better opportunity to reunite her sister with the man she has always loved by inviting him to stay at the last available townhouse next door in the Royal Crescent. Her plan is coming along splendidly, until the earl of Guildford walks—or rather, saunters—into town, and steals it from under her nose.

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.

When faced with an unwanted marriage, Alice Rosemeyer accepts an invitation to the estate of Larkhall. Determined to earn her future security without a husband, she begins operating as the anonymous Ace of Hearts, writing letters and offering advice on behalf of the men eager to secure a match at the close of the London season. If she can manage to keep her identity secret, her reputation intact, and avoid the arrogant house guest, Mr. Thomas Herring, she might just call herself successful.

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.