Animation. Dennis lives in Beanotown with Mum, Dad, little sister Bea and his pet dog Gnasher. Gnasher is more than a dog to Dennis: he is a kindred spirit. Whatever Dennis does, Gnasher does with him. Together with their friends Curly and Pie Face, Dennis and Gnasher believe the world truly is their oyster and that kids should make the rules. Not everyone agrees, including Mum and Dad, but Dennis and Gnasher are not going to let that stand in the way of their pursuit of fun! Mum and Dad enlist the help of supernanny Nanny Moonbeam to help correct Dennis's naughty behaviour. Initially Dennis thinks that his new nanny is a pushover, but before long he cannot escape her or her methods. Dennis is prevented from having any fun and needs to resolve the situation. After an embarrassing encounter with Walter, Dennis comes up with a plan. Dennis ropes Curly and Pie Face into his plan and, before long, he has them dressed up as Walter running around Beanotown causing chaos. Dennis's plan to get rid of Nanny Moonbeam is a success as she is immediately taken on by Walter's parents. Result!