 Novelist Iain Sinclair takes us on a surreal exploration of secret sites of London; the pattern made by the victims of Jack the Ripper, the ley lines that mysteriously connect the Thames, Greenwich,and the Isle of Dogs, ancient lairs of the Knights of the Templar, and Victorian haunts in the East End. We follow him as he undertakes his latest ambitious project, the circumnavigation of the M25 Motorway.