GHOSTS ON THE UNDERGROUND is an unconventional journey through the oldest public transport system in the world seen from a chillingly unfamiliar perspective. One billion people a year, from all over the world, descend deep below London into the tunnels and stations of the underground, without a second thought for the huge number of graves, church crypts and plague pits that tube construction has disrupted over the years, nor about accidental deaths that have occurred on the network.