Hazel Green is a free spirit - independent, mischievous and charming. She lives on the 12th floor of the grand old Moodey Building. Each year, on Frogg Day, a fabulous parade fills the city 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.