In this book it is around Halloween time. Since Heidi the main character is a witch, (a nice one though) she always hates it when people dress up as witches for Halloween because they make their witch costume so ugly and she feels defended. When Heidi's enemy Melanie Maplethrope dresses up as an ugly witch for Halloween Heidi tries to think of a way to get back at her. Then Heidi comes up with an idea. She decides to dress up as Melanie for Halloween. But, when Heidi wears her Halloween costume to school and starts to be mean to everybody including her best friends, Lucy and Bruce, just like Melanie would do everybody starts to not like the way that Heidi is treating them Heidi starts to feel bad about what she had done.
That night at Halloween trick or treating Heidi's friends are still mad at her for treating them badly so Heidi has to go trick or treating with her brother and her brothers friend. While Heidi is trick or treating with the little boys she finds Melanie trick or treating. Heidi tells Melanie she was sorry and showed her that had changed her costume to a princess costume. Melanie ends up forgiving Heidi. Then, after she finishes talking to Melanie Lucy and Bruce come around the corner. when Heidi says hi to them Lucy and Bruce ignore her and pretends that she isn't even there. Then Lucy and Bruce come back to let her apoigize. So, Lucy and Bruce forgive Heidi and ask her to go trick or treating with her for the rest of the night. Heidi says yes and trick or treats with them for the rest of the night. Heidi is glad that everything is back to normal again.:) Catalog