The Strathcarrons have lived in splendour in Lednock Castle in Scotland for many generations, but the family falls on hard times. An American guest, Larry Harwood, comes to stay and persuades the Earl of Strathcarron to travel to New York with him to make his fortune, leaving his wife, son Ewen, and daughter Moira to the mercies of fate. Six months later, the earl returns a broken man, having lost the entire estate to Americans creditors. Ewen and Moira hatch a desperate plan to save the castle and their very inheritance from the clutches of the American bank. They realise that their only recourse is to make good marriages into wealthy families to bail out their father, so they head for London.