Comedy centred around a band of eccentric DJs running a rock 'n' roll radio station from a boat on the North Sea. It's the swinging 60s, but mainstream broadcasters haven't caught up with the rise of rock 'n' roll and pop music.
With no one else playing the music that they want to listen to, the DJs decide to take matters into their own hands by starting a pirate radio station from their boat. A rousing success, they help a generation fall in love with these new kinds of music, much to the dismay of a government minister who strongly believes that this brash upstart culture has no place in British society.