Kiki Button—war veteran, party girl, detective, and spy—finds that she can't outrun her past exploits, even in the glittering world of Jazz Age Paris.

Paris in 1921 is the city of freedom, where hatless and footloose Kiki Button can drink champagne and dance until dawn. She works as a gossip columnist, partying with the rich and famous, the bohemian and strange, using every moment to create a new woman from the ashes of her war-worn self.

While on the modelling dais, Picasso gives her a job: to find his wife's portrait, which has gone mysteriously missing. That same night, her spymaster from the war contacts her—she has to find a double agent or face jail. Through parties, whisky, and seductive informants, Kiki uses her knowledge of Paris from the Great War to connect the clues.

Set over the course of one springtime week, April in Paris, 1921 is a mystery that combines artistic gossip with interwar political history through witty banter, steamy scenes, and fast action.