Supernanny Jo Frost faces a tough assignment when she agrees to move into the home of single mum Kelly Steer. Kelly's two young children have pretty much destroyed the family home. Out of control four-year-old Callum and five-year-old Sophia dominate the house. They fight with each other, won't eat properly, destroy their bedrooms, refuse to sleep at bedtime, and worst of all, they have been known to physically attack their mum. No-nonsense nanny Jo wastes no time enforcing a massive family rethink, beginning with a major tidy-up. She introduces her radical Toy Confiscation Technique, which involves reducing the number of toys to ten and taking a further toy away every time each child misbehaves. Jo combines this with plenty of warnings for bad behaviour and a naughty corner where the children are sent until they apologise. Tears and tantrums are in full force as Jo struggles to enforce her strict routine. Even mum Kelly finds it hard. Can Supernanny Jo make her mark, or does it all prove too much for the Steers?