In the town of River Heights, there is an ancient house owned by the eccentric Mrs. Ayreshire. Local legends say the house is “alive,” and changes dimensions when “the stars are right.” The normally private Mrs. Ayreshire has asked her friend Carson Drew for help, but she hasn’t indicated what the nature of her “problem” might be. Can Nancy Drew and the Hardy Boys solve the mystery of the Five and a Half Minute Hallway?