1927. Flight fever is running high and daring flyers are all anyone can talk about. And now the Honourable Miss Elsie Mackay, glamorous former film star and regular name in gossip columns, has a new ambition - to be the first woman to fly the Atlantic.Elsie's friend Stella Campbell once felt at the heart of world events, but now post-war hopes are frayed and marriage and motherhood have worn away her sense of self.In recent years, Stella's sister Corran has been wrapped up in her books and academic career, determinedly single, or so it seems.But when Corran's carefully guarded secrets start to emerge, will she choose to follow her heart?The Endeavour of Elsie Mackay takes the moving story of a pioneering Scottish aviator and weaves in the threads of other women straining to reach for their dreams on the cusp of an uncertain future.