When Louisa Deasey receives a message from a Frenchwoman called Coralie, who has found a cache of letters in an attic, written about Louisa's father, neither woman can imagine the events it will set in motion.

The letters, dated 1949, detail a passionate affair between Louisa's father, Denison, and Coralie's grandmother, Michelle, in post-war London. They spark Louisa to find out more about her father, who died when she was six. From the seemingly simple question "Who was Denison Deasey?" follows a trail of discovery that leads Louisa to the streets of London, to the cafés and restaurants of Paris, and a poet's villa in the south of France. From her father's secret service in World War II to his relationships with some of the most famous bohemian artists in post-war Europe, Louisa unearths a portrait of a fascinating man, both at the epicenter and the mercy of the social and political currents of his time.

A Letter from Paris is about the stories we tell ourselves and the secrets the past can uncover, showing the power of the written word to cross the bridges of time.