Hazel Green lives in the heart of the city. Each year, on Foggy Day, a fabulous parade fills the streets but children are forbidden to march. Hazel has her own ideas about this. (She has her own ideas about most things) But what can she do when her plans tumble down and she's blamed for someone else's crime? And what part will that strange boy, the Yak, play in her story? Life is full of discovery for Hazel Green.