Book Four of the Carnacki Continuum. Three years after going missing in Putney, the famous ghostfinder Thomas Carnacki has been found in an abandoned London underground station. He has been found in one of hundreds of huge seed pods, a nursery of interdimensional invaders. Sir Barnard Buxton has been in charge up to this point, but there are people more important than him - politicians, military men, and fellow scientists. Over the next eighteen hours they gather below King William Street, in the heart of the City of London.

When Carnacki learns what they intend to do he knows he has to act. The establishment VIPs don';t understand. They are risking apocalypse. He makes his way across London. We get an insight into what it is like to be a seer of ghosts in a city decimated by war and the Spanish Flu. Crowds, living and dead, block his way to the abandoned tube station. Will he get through in time?