Castle Dangerous (1831) was the last of Walter Scott's novels published in his lifetime. The story is set in Ayrshire and Lanarkshire around 1306, shortly after the death of William Wallace during the Wars of Scottish Independence. Lady Augusta has promised to marry Sir John de Walton provided that he can maintain possession of the castle he has captured for a year and a day. Regretting her promise, she resolves to travel in disguise to the castle to find some method of subversion.