Set in inner-city Woolloomooloo, New South Wales in Sydney, New South Wales in 1930, the neighbourhood nice guys are led by Fatty (real name Hubert Finn), an ambitious 10-year-old with an eye for making a Australian pound. From shady frog jumping contests to a fixed goat race, Fatty uses his enterprise to raise enough money to buy a crystal set (radio without a separate power supply) that's worth seventeen shillings & sixpence (17/6), more than his Dad is able to save up in a year. Bruiser Murphy the bully and his gang try to stop him. Fatty uses his brains against his enemies' brawn to eventually triumph.