The Secret in the Old Lace (Nancy Drew Mystery Stories, No. 59)

Nancy Drew has entered a contest to solve an old mystery-the disappearance of a Flemish nobleman, a pair of lace cuffs, and a priceless treasure. In a thrilling story shadowed by a romance of the past, Nancy solves a mystery over a hundred years in the making. While in Belgium investigating the mystery surrounding an antique cross, Nancy and her friends learn that her entry in a short story contest may somehow be involved. "Nancy, Bess, and George fly to Belgium to investigate when Nancy's submission to a magazine contest involving the solution to the disappearance of a priceless treasure turns up in another contestant's hands."