Nancys classmate, Willa, is convinced something is terribly wrong with her friend Izzy. Nancy and her friends must try to figure out why Izzy is acting strangely after visiting a haunted house. Is Izzy possessed by the ghost of Heliotrope Lane? nNancy and her friends must try to figure out why a girl is acting strangely after visiting a haunted house in this sixteenth book of the Nancy Drew Diaries, a fresh approach to the classic mystery series. nNancys classmate, Willa, needs her help. Willa is convinced something is terribly wrong with her friend Izzy, but everyone has dismissed Willas concerns, saying its just teen angst. But Willa thinks its more than that; she thinks Izzy is possessed. n nIt all started when Willa and Izzy snuck into an abandoned house with some of their friends. After running around and exploring, Willa went in to the basement and found Izzy staring into space. Izzy was conscious, but she was acting weird--she wouldnt speak and she didnt seem to recognize Willa. And when Izzy finally woke up from her trance, she had no memory of the previous few hours. Since then, Izzys continued to act strangely. Shes usually funny and easygoing, but now shes high strung and has intense fits. Once she even threatened to hurt Willa. n nNancy is sure theres a rational explanation for all of this and has a feeling shell find it at the haunted house. But what she finds has her questioning her resolve. Could Willa be right? Is Izzy possessed by the ghost of Heliotrope Lane?n