"December 1926: England unleashes the largest manhunt in its history. The object of the search is not an escaped convict or a war criminal, but the missing wife of a WWI hero, up-and-coming mystery author Agatha Christie. When her car is found wrecked, empty, and abandoned near a natural spring, the country is in a frenzy. Eleven days later, Agatha reappears, claiming amnesia. She provides no answers for her disappearance. That is...until she writes...

Desperate for money, struggling young author Nancy Mitford takes a job managing the Heywood Hill bookshop, where she meets a mysterious French officer who has a compelling story to tell.