It's a busy, whimsical holiday season at New York's Biedermeier Hotel, where residents take on seasonal jobs from Broadway usherettes to holiday window dressers. Amid the festive hustle, Katherine seeks to reconnect with her sister, Lucianne launches a quirky escort business, and Mrs. Mossler frets over missing jewels, hotel finances, and Christmas tips. Filled with charm, mystery, and holiday spirit, the story weaves together humor, family dynamics, and intrigue in a bustling city during Advent.