Jools Holland embarks on a personal journey through the streets, historical landmarks, pubs, music halls and rock 'n' roll venues of London to uncover a history of the city through its songs, the people who wrote them and the Londoners who joined in the chorus. Unlike Chicago blues or Memphis soul, London has no one definitive sound. Its noisy history is full of grime, clamour, industry and countless different voices demanding to be heard.