An all-female detective agency righting wrongs at the end of the nineteenth century; infiltrating a scandalous upper-class world straight out of Bridgerton and using their wit and bravery to unmask a villain. Eighteen-year-old Isobel Stanhope is keeping a lot of secrets.
 
There's the fact that she's head over heels in love with a Duke who doesn't know she exists; there's the fact that her family is penniless but nobody in society knows about it; and then there's her job at the Aviary, an investigative agency run by women that specializes in digging up scandal on powerful men.
 
When Izzy finds herself pulled into a case that involves gaslighting, blackmail, and missing jewels, as well as the Duke who holds her heart, can she and her friends untangle the web of secrets and lies to uncover the truth and protect the innocent? And when the stakes are so high, what happens when the crush she's been hiding begins to turn into so much more?