Teens P.J. and Goose get their thrills on BMX bikes, performing hair-raising tricks all across Sydney, Australia. Along with their new friend Judy, they discover a box of walkie-talkies — and find out that a gang of criminals intends to use them to monitor police signals during a bank robbery. When the young trio snatches the devices, it propels them on a hair-raising adventure in which their pedaling skills might just save their necks.