Perhaps the strangest incident in the history of the Hope Diamond occurred in the year 1630. Gilderoy, a bold and daring Scottish highwayman, has just returned to Scotland from France and is wearing an unusually large and beautiful diamond ring. Sir Percy MacDougal has learned of the ring and how Gilderoy obtained it, and is certain that soon Gilderoy will go to visit his sweetheart Peg Cunningham who lives just across the moor. Sir Percy has sworn to capture Gilderoy, and so visits Peg, in an effort to convince her to betray her lover...