Three-year-old Matthew is spreading misery throughout the Pollard-Morris home. From dawn till dusk, he subjects parents Trisha and Daren and his three siblings to a soundtrack of whinging, whining, screaming and moaning. Everyone's sick of his behaviour. But when Supernanny Jo Frost arrives she offers a different diagnosis to the problem. She sees mum's tendency to mollycoddle Matthew with a diet of baby bottles and dummies as a key factor in the unhappy toddler's problem behaviour. Trisha lets Matthew use dummies through the day and he is pacified with a bottle several times a night. To make matters worse, sibling rivalry between eight-year-old Matt and James means there is never any peace in the house. Supernanny is clear. It's time to let these children grow up and take some responsiblity. But can Trisha find the strength to resist her instinct to baby the children?