Jo Frost takes on two brawling brothers, seven year old, Louis and five year old Rhys. Mum Steph has no control over the destructive duo and can’t stop them fighting with each other… or with her. However, when bodybuilding dad Simon’s around it's a totally different story. The battle to control the boys is only half of Supernanny's challenge. She's really got problems when Simon decides he's had enough of her interference. Can she square up to him, shake up Steph and sort out the brothers?