At the Durrisdeer estate in Scotland in 1745, Jamie Durie (Errol Flynn), his younger brother Henry (Anthony Steel) and their father Lord Durrisdeer (Felix Aylmer) receive news of the Jacobite rising. Their retainer, MacKellar (Mervyn Johns), recommends that one brother join the uprising while the other remains loyal to King George II, so that whichever side wins, the family's status and estate will be preserved. Both brothers want to go. Jamie insists on tossing a coin for the privilege and wins, despite the opposition of his fiancée, Lady Alison (Beatrice Campbell).