Fatty Finn (Robin 'Pop' Ordell) is the six-year-old leader of a gang of kids in Woolloomooloo. They enter Fatty's pet goat Hector in the annual goat derby, but his rival Bruiser Murphy (Frank Boyd) lets the goat loose before the race. After a series of adventures, Fatty finds the runaway goat and persuades a friendly aviator to fly him to the race-track in time for the main event.