It is the summer of 1919. Now that all the men have returned from the front, Constance Haverhill has been asked to give up her cottage and her job at the estate she helped run during the war. She is sent as a lady’s companion to an old family friend who is convalescing at a seaside hotel. Despite having only weeks to find a permanent home, Constance is swept up in the social whirl of Hazelbourne-on-Sea after rescuing the local baronet’s daughter, Poppy, from a social faux pas. Poppy runs a ladies’ motorcycle club, to which she plans to add flying lessons. She and her friends enthusiastically welcome Constance into their circle. As the country prepares to celebrate its hard-won peace, Constance and the women of the club are forced to confront the fact that the freedoms they gained during the war are being revoked.