1906: Lady Elizabeth “Libby” Sinclair, with her love of microscopes and nature, isn’t favored in society. She flees to the beautiful Isles of Scilly for the summer and stumbles onto the dangerous secrets left behind by her holiday cottage’s former occupant, also named Elizabeth, who mysteriously vanished. Oliver Tremayne - gentleman and clergyman - is determined to discover what happened to his sister, with the help of the girl now living in what should have been Beth’s summer cottage...especially when he realizes it’s the curious young lady he met briefly two years ago.

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.

He was intrigued...Nathaniel Hammond, Earl of Beverton, is working to restore his new estate and aid his tenants. But everything changes when he meets the beautiful and mysterious Moira Dennison, a bold young woman who offers to hire him, unaware of his title, to help her find her fiancé. Curious and unable to resist, Nathan accepts her offer, keeping his true identity a secret, never dreaming of what the future held for him.

Selena Lockhart comes with neither fortune nor connections, and she knows better than to expect society to give her a welcome—especially after her father gambled away his fortune, precipitating the family’s sudden fall from grace and Selena’s betrothed to break off the engagement. It therefore comes as no surprise that her new neighbor, Sir Lucius, treats her with disdain. Why should he look beyond appearances when her own promises so little?

Brook Eden has never known where she truly belongs. Though raised in the palace of Monaco, she's British by birth and was brought to the Grimaldis under suspicious circumstances as a babe. When Brook's friend, Justin, uncovers the fact that Brook is likely a missing heiress from Yorkshire, Brook leaves the sun of the Mediterranean to travel to the moors of the North Sea, to the estate of her supposed family.