In the human world, 13-year-old optimist Molly McGee arrives in her new hometown of Brighton, only to discover that her new house is already occupied by a grumpy ghost named Scratch. Scratch curses Molly in an attempt to get rid of her. However, the curse backfires on Scratch, who now finds himself forever tied to Molly. After a rocky introduction between Scratch and Molly's family, Scratch and Molly form a tentative friendship. Meanwhile, in the Ghost Realm, the level of misery in Brighton decreases slightly; the Ghost Council's Chairman notices this. While initially antagonistic toward her, Scratch opens up to Molly over-time, and their friendship strengthens.