Nancy Drew travels to England to visit Linda Penvellyn, her neighbor's daughter and newlywed wife of a British diplomat. Linda is currently living in Blackmoor Manor, a 14th-century mansion haunted by a tragic past. A mysterious malady keeps Linda hidden behind thick bed curtains. Is she hiding from something or someone, or is a more menacing threat stalking her? Nancy is tasked with solving this mystery by learning more about the family's history, exploring the mansion, and discovering the secrets of the family that have been hidden away for generations.