Princess Maddy rules the roost in the Porters household. She is a nine year old who tantrums like a two year old if she doesn't get her own way. The whole family is treading on eggshells. Mum Hayley treats her like a baby: choosing her clothes, helping her shower, brushing her teeth and cutting up her food for her. Maddy even has to be bribed to take a shower. Tantrums, which can involve biting and scratching, sometimes last for hours - with mum being the main focus of Maddy's outbursts and physical aggression. Hayley's first child from a previous marriage died before he was two. Supernanny soon realises that this is why Hayley's been wrapping Maddy up in cotton wool. But will this insight help Supernanny tame the tantrums? Or is this one battle of the wills that can't be won?