Left with an estate on the brink of bankruptcy after their father's death, Lady Marigold Fairfax and her brother open a private investigation firm marketed to the elite . . . to spy on the elite. Dubbed The Imposters, Ltd., their anonymous group soon becomes the go-to for the crème of society when they want answers delivered surreptitiously. But the many secrets Marigold learns about her peers pale in comparison to her shock when she and her brother are hired to investigate her best friend's father as a potential traitor.

Miss Harriet Peabody dreams of the day she can open up a shop selling refashioned gowns to independent working women like herself. Unfortunately, when an errand for her millinery shop job goes sadly awry due to a difficult customer, she finds herself out of an income. Mr. Oliver Addleshaw is on the verge of his biggest business deal yet, when he learns his potential partner prefers to deal with men who are settled down and wed. 

Miss Isadora Delafield may be an heiress, but her life is far from carefree. When her mother begins pressuring her to marry an elderly and uncouth duke, she escapes from the high-society world she's always known and finds herself to be an unlikely candidate for a housekeeper position in rural Pennsylvania. Mr. Ian MacKenzie is known for his savvy business sense and has built his reputation and fortune completely on his own merits. But when his adopted parents are in need of a new housekeeper and Isadora is thrown into his path, he's unexpectedly charmed by her unconventional manner.

Beauty has been nothing but a curse to Penelope Snow. When she becomes a personal maid for a famous actress whose troupe is leaving Chicago to tour the West, she hides her figure beneath shapeless dresses and keeps her head down. But she still manages to attract the wrong attention, leaving her prospects in tatters—and her jealous mistress plotting her demise.

When Miss Charlotte Wilson asks God for a husband, she decides He must want her to pursue Mr. Hamilton Beckett, the catch of the season. The only problem? She's never actually met Hamilton. Fortunately, one of her oldest and dearest friends, Mr. Henry St. James - who has returned to New York after a two-year absence - does know Hamilton. Much to Henry's chagrin, Charlotte immediately ropes him into helping her meet Hamilton. However, none of her plans to catch Hamilton's eye go as she expected, and she is even more confused when her old feelings for Henry begin to resurrect themselves.