The Battersea Bats are a gang of four kids who have their den in an abandoned building near the Thames, and they have a plan of action in mind because in about a week there is a soapbox derby being held, a contest they mean to win.

A man who works for 'The Party' (an all powerful empire led by a man known only as 'Big Brother') begins to have thoughts of rebellion and love for a fellow member. Together they look to help bring down the party.