In nineteenth-century England, after her father's disappearance Nan Sparrow, ten, works as a "climbing boy," aiding chimney sweeps, but when her most treasured possessions end up in a fireplace, she unwittingly creates a golem.

During his third year at Hogwarts School for Witchcraft and Wizardry, Harry Potter must confront the devious and dangerous wizard responsible for his parents' deaths.