Elsa is working as a counselor at Green Spring Pony Club's summer camp, preparing the girls for a regional competition, when one of the horses is sabotaged and she must call on Nancy Drew for help.
When a thief takes off with the veil of the bride of a wedding she is attending, Nancy follows a trail of intrigue across the New England countryside and discovers a sixty million dollar mystery behind the veil.
Famous visitors have both Nancy and Bess excited--Nancy about astronomer/radio personality Dr. Stars, and Bess about Hollywood heartthrob Will Ryder. But anticipation turns to investigation when Nancy discovers her hero's deserted van and one of his rivals appears in town.
Nancy Drew, vacationing in Paris, becomes involved in the investigation of vandalism in the building where she is staying and the theft of puppets from an in-house theater.
While Nancy and her friends are helping with a high school "chemystery" camp that teaches how science is used to solve crimes, a real mystery involving the professor in charge begins, and Nancy takes over the made-up case and the real one.
Nancy Drew and her friends become caught up in a dangerous investigation when they agree to help search for a diamond thief while on a cruise around the Great Lakes.
