When a intelligent but clumsy Hufflepuff named Arabella Stonefield experiments with a new charm meant to amplify plant growth, she accidentally shrinks herself to the size of a fairy. Stranded in a world now gigantic and perilous, she becomes the unwilling “pet project” of the four Slytherin boys who’ve always despised her — Mattheo Riddle, Theodore Nott, Draco Malfoy, and Blaise Zabini.