Rosalind is newly, happily engaged to ex-Bow Street officer Adam Harkness, but lunching with the new fiancée of her old love is still discomfiting. Yet, Clara Kinsdale needs her help, and Rosalind is not one to turn away a lady in distress. It seems Clara's father, Sir Anthony Kinsdale, has fallen for beautiful widow Mrs. Sylvia Lynn—who may be a fortune hunter, or worse . . .

Sir Anthony is a profligate baronet, who has pinned his financial hopes on two events: Clara's marriage, and his horse winning the upcoming sweepstakes at Lansdown, on which he has wagered heavily. Clara is afraid that her father is being fleeced by the charming—and cunning—Mrs. Lynn and wants Rosalind to expose her.

But Clara does not realize that her sisters, Elizabeth and Cynthia, are harboring their own secrets and Elizabeth especially will do whatever she must to obstruct plans to separate their father from Mrs. Lynn.

Rosalind and Adam travel to Bath to meet the family. But their gathering is interrupted by Admiral Walsingham, who is leasing Kinsdale House. Despite his dire finances, Sir Anthony is evicting the admiral—though his reasons appear laughable. Not laughable is that Sir Anthony is found dead soon after their argument, having apparently tumbled from his bedroom window while intoxicated.

It would be easy to assume the tragedy was an accident, except Admiral Walsingham is found dead at nearly the same time. Secrets, schemes, fraud and forbidden love all drag Rosalind and Adam into a web of high-stakes gambling, murder—and extreme danger. But can they unravel it before they become the next victims. . .