The London Underground carries more than a billion passengers a year, and this film asks what else rides along with them. It is the oldest underground railway network in the world, built through centuries of buried city: church crypts, old graveyards, and plague pits that tunneling crews cut through or built directly over. The film treats those disruptions as the source of the network's reputation for haunted platforms and tunnels, moving station by station through the stories staff and passengers tell about presences felt underground. Without a named narrator or on-camera historian in the available material, the case rests on the London Underground's own age and the physical fact of what lies beneath its tracks. It stays a modest, station-by-station survey of ghost lore rather than an investigation with new evidence, aimed at viewers who want the stories collected in one place rather than tested.