When an unexploded bomb goes up in a street in the London area of Pimlico, it exposes a cave containing goblets, gold, art and other valuable artefacts. The gold is immediately claimed by the crown, but expert Professor Hatton-Jones comes forward with a royal charter that proves the area is legally Burgundy. With their newfound independence, the residents scrap rationing, opening hours and adopt an altogether more continental lifestyle. However Whitehall cuts them off, leaving Pimlico overrun by undesirables seeking refuge from England's laws. Things get harder as the political tensions between the two 'countries' increase.