After years devoted to motherhood, Molly Murphy is ready to open her own detective agency. Balancing clients with children may prove a challenge, but Molly has never been one to shy away from hard work—or danger. And with a new “morality police” determined to clean up New York City through raids and censorship, Molly already has her hands full keeping an eye on her friends Sid and Gus, whose lifestyle makes them an easy target. Then Molly lands her first official case.

The formidable Mrs. Alva Belmont—once a Vanderbilt and now a powerful voice in the suffrage movement—asks Molly to discreetly follow her daughter Consuelo, who has arrived in New York for the Vanderbilt Cup race. Consuelo’s marriage is strained, and Mrs. Belmont fears her daughter may be rekindling a previous relationship before she was forced into a socially advantageous match. A public scandal could be devastating.

But the high-society world surrounding the races proves far more complicated than Molly expected. As she slips into the glittering crowds and shadowy corners of New York’s elite, Molly discovers she’s not the only one watching Consuelo. A reporter is also digging into the private lives of society’s heirs and heiresses, determined to expose them.

Secrets begin to surface—ones people would do anything to keep buried. Molly finds herself caught in a web of suspicion and danger that could threaten not only her new business, but her freedom.