One summer day, Mary, a red-haired girl, was sent to Aunt Charlotte's country cottage for a holiday. As a newcomer, Mary is not quite used to everything around her, especially the naughty boy Peter (voiced by Kamiki Takesuke) who intends to fight against her, which makes Mary really unhappy. On an accidental expedition in the forest, Mary saw the legendary magic flower "Night Flying" and found a broken broom. It happened that this magic broom carried Mary into the sky and came to Ende School, which specializes in training wizards. In this magical place, Mary was received by Ms. Mambrechk (voiced by Tianhai Youxi) and met the strange-looking Dr. D (dubbed by Xiao Rixiang Wen Shi). Although the girl became a magic cadet, he soon discovered the secret hidden here. This film is based on Mary Stewart's English children's literature novel and is the first animated feature film made by Milin Hongchang since he left Studio Ghibli.