When high school sophomore Clara Tuffney is hired for a summer internship at an engineering firm, she accepts an invitation to live with her Aunt Maureen in the quiet seaside town of Breach Point, New Jersey.
Soon after arriving, Clara learns of the infamous Breach Point Castle, a haunted attraction that once stood on the town's busy amusement pier. While searching out the Castle's former location, Clara befriends Nicholas, a shy local boy. Nicholas introduces Clara to his Uncle Kevin who, along with his friends, worked at the Castle during its prime.
Through Nicholas, Clara discovers that the Castle burned down in a mysterious fire in the early 1980s. She also learns of a local legend – a boy named Eric, rumored to have possessed supernatural powers, was killed in the fire – though many doubt that he actually died. Some of the town's residents even believe that Eric has returned to Breach Point in the form of a malevolent spirit – a story Kevin sternly cautions Clara against believing.
Clara's curious nature soon brings her closer to finding out the secret behind what really happened to the Castle and to Eric – though her search for answers places herself, Aunt Maureen, and Nicholas directly in the path of a danger she does not fully understand.