This is a sequel to Kidnapped. Many thought Kidnapped ended quite abruptly. The reason is Stevenson planned on writing a sequel. Catriona takes up the story of David Balfour on the same day Kidnapped ends. He must now try to clear his name and the name of James Stewart of the Appin murder. This will not be easy because the Campbells want James Stewart to hang.

"Catriona: Being Memoirs of the Further Adventures of David Balfour at Home and Abroad, in which are set forth his misfortunes anent the Appin Murder, his troubles with Lord Advocate Grant: captivity on the Bass Rock, Journey into Holland and France, and singular relations with James More Drummond or MacGregor, a son of the notorious Rob Roy, and his daughter Catriona: written by himself, and now set forth by Robert Louis Stevenson."