Greendale is holding a go-kart race. Mrs. Goggins warns everybody that anyone wishing to compete in the race must not use engines in their go-karts. At first the racers start out as a "father and child" team, but because Pat is not too good at building Julian's go-kart and the other fathers are barely letting their children help them make theirs, the children decide to form their own team. They modify Pat's go-kart and Julian is chosen to be the team's driver with Jess as his mascot.Meanwhile, Alf, P.C. Selby and Ajay secretively decide to cheat and borrow quiet electric engines for their go-karts from Ted. Ted tries to warn them that they won't stop, but Alf, Ajay and Arthur take no notice and on the day of the race, their go-karts just race on past the finishing line without stopping after both laps. They try flicking the switches on the engines, but it does not help and they drive out of control towards the edge of Greendale Crag. Pat has to set sail in Julian's go-kart in order to save them.Ajay and Alf are saved before reaching the crag thanks to a bush and a pile of hay, but Arthur is still heading straight for the edge. Pat has to bump Julian's go-kart into Arthur's in order to drive him away from the edge of the crag. Arthur then finally stops when he falls into a pile of manure.When Ajay, Alf and Arthur return to the Green after being saved, Mr. Pringle disqualifies them for using engines in their go-karts and he gives the winner's cup to the children's team. They are all very happy indeed and Julian is very glad that he stuck to the rules of the race after all.