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! To avoid the rest of a boring school outing with the Colonel, Dennis and his friends take a canoe out onto Beanotown Lake. They are followed by Walter, Bertie and Dudley, and the two groups of friends find themselves marooned on a desert island. As on land, the two groups maintain their factions. At first, they enjoy their new-found freedom, but tensions between the two groups grow when Walter steals Curly's chocolate bar, and as their war is about to escalate, Pie Face seems to lose his mind. Pie Face pursues the pie that he smells, followed closely by Dennis, Gnasher and Curly. When they run through the fog, they can't believe what they see. They never left Beanotown Park.