When Mother Malkin, the queen of evil witches, escapes the pit she was imprisoned in by professional monster hunter Spook decades ago and kills his apprentice, he recruits young Tom, the seventh son of the seventh son, to help him.

A little girl lives in a very grown-up world with her mother, who tries to prepare her for it. Her neighbor, the Aviator, introduces the girl to an extraordinary world where anything is possible, the world of the Little Prince.