As the mysterious Lady Whistledown reports in her social column, we saw, during the famous masked ball of the Bridgertons, the youngest of the family, Benedict, in the company of a lovely stranger dressed in a silver dress. But at midnight, the beauty fled. Since then, high society has been lost in conjectures about its identity. Benedict searches all over London for her, but she seems to have disappeared forever. Who could know that under the black silk mask hid Sophie Beckett, the illegitimate daughter of the Earl of Penwood, hated by her stepmother who confines her to the office? When Benedict comes across Sophie again, will he be able to recognize her under her ugly servant clothes?