Based on the real events surrounding the lives of Jessica 'Chubbie' Miller and ex-RAF pilot/adventurer Bill Lancaster, the screenplay follows Miller's departure for England in the early 1920s in search of adventure. There she meets and falls in love with the already-married Lancaster and becomes involved in his unsuccessful attempt to be the first person to fly from Britain to Australia. It also focuses on the murder of Haden Clarke, Miller's American biographer and the man she was also having an affair with. Although Lancaster was charged with Clarke's murder, Miller stood by him and he was eventually acquitted. The series ends with Lancaster's ill-fated attempt to beat Amy Johnson's new record flight from London to Capetown. After his plane disappears in the Sahara Desert, Lancaster's wife and mother prevent Miller from mounting a search and he is eventually presumed dead. An epilogue details the discovery twenty-nine years later of Lancaster's remains and his diary.
