Jo Frost really has her work cut out when she meets Stuart and Laura, a kick boxing couple, and their three kids, five-month-old Diesel, two-and-a-half-year-old Tegan-Olivia and five-year-old Matthew, whose aggressive and violent behaviour often leaves mum battered and bruised. When Supernanny arrives she sees how bad the situation is. After laying down some household rules, Supernanny introduces a special 'work out your anger' chart and a chill-out chair to tackle Matthew's tantrums. Supernanny then encourages mum to let go of the reins and allow Stuart a more active role with Matthew, before leaving them to implement the techniques by themselves. It all goes well at first, until Matthew stages an epic one child riot leaving the house looking as if it's been burgled. When Supernanny returns will she be able to get the troubled family back in harness?