yle="color: rgb(17 17 17); font-family: Helvetica Arial sans-serif; font-size: 13px; background-color: rgb(255 255 255);">Mildred returns to Ms. Cackle's academy with the hopes of a better year; but when her summer holiday project is stolen she has to prove she didn't make it up. Meanwhile a group of first years discover a secret in a tree. Plus a discovery in the school's ruins spells hope and trouble for everyone