Nancy Drew searches the attic of an old mansion that is haunted by a life-size puppet, and learns that someone is trying to keep her from solving the case.
When Nancy attends a wedding in Boston, a thief makes off with the bride's antique veil. She follows a trail of intrigue across the New England countryside and discovers a $60 million mystery behind the veil.
When Nancy is asked to replace a missing model in the benefit fashion show, she discovers that not only has the model's clothes been stolen, but also the entire designer's collection as well as the designer's brother.
Nancy's friend Cindy, a teen model, is about to appear in a major television commercial. While Nancy is visiting her in Chicago she disappears, and while looking for her, Nancy is plunged into danger.
While vacationing in the Midwest with her friends, Nancy Drew investigates a mysterious magnetic cloud, searches for a hijacked plane, and hunts a horse thief.
Despite warnings from a stranger, Nancy sets out for France to search for a flight of 99 steps which may help solve the mystery of a weird dream and a possible case of blackmail.