In 1757, Moonfleet is a small village near the sea in the south of England. It gets its name from a formerly prominent local family, the Mohunes, whose coat of arms includes a symbol shaped like a capital 'Y'. John Trenchard is an orphan who lives with his aunt, Miss Arnold. Village legend tells of the notorious Colonel John "Blackbeard" Mohune who is buried in the family crypt under the church. He is reputed to have stolen a diamond from King Charles I and hidden it. His ghost is said to wander at night looking for it and the mysterious lights in the churchyard are attributed to his...