Mildred begins the new school term bursting with confidence. Her skills are tested when she attempts to win a flying competition with a very special prize

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