Richard Mayhew is a plain man with a good heart -- and an ordinary life that is changed forever on a day he stops to help a girl he finds bleeding on a London sidewalk. From that moment forward he is propelled into a world he never dreamed existed -- a dark subculture flourish in abandoned subway stations and sewer tunnels below the city -- a world far stranger and more dangerous than the only one he has ever known...Richard Mayhew is a young businessman...