Fashion is returning to the forefront in Paris, as the somber hues of wartime are replaced by vibrant colors and ultra-feminine silhouettes, influenced by Christian Dior’s “New Look.” Tabitha and Julia join a friend for a private showing at an exclusive fashion atelier, Maison Lannet. The event goes well, but when Tabitha returns later that evening to search for a lost glove, she finds the lights still on --- and the couturier dead, strangled by a length of lace. The shop manager suspects that a jealous rival --- perhaps Dior himself --- committed the crime. Tabitha dismisses that idea, but when another body is found, it’s apparent that someone is targeting employees of Maison Lannet. It’s up to Tabitha to don her investigative hat and find answers before someone commits another fatal fashion faux pas.

As postwar Paris rediscovers its joie de vivre, Tabitha Knight, recently arrived from Detroit for an extended stay with her French grandfather, is on her own journey of discovery. Thanks to her neighbor and friend, Julia Child, another expat who has fallen head over heels for Paris, Tabitha is learning how to cook for her Grandpère and her Oncle Rafe. Between tutoring Americans in French, and sampling the results of Julia's studies at Le Cordon Bleu cooking school, Tabitha's sojourn is thoroughly delightful. That is, until the cold December day they return to Julia's building and learn that a body has been found in the cellar. Tabitha is eager to help the investigation but is shocked when Inspector Merveille reveals that a note, in Tabitha's handwriting, was found in the dead woman's pocket.