Beneath London : A Tale of Langdon St. Ives

When the sudden collapse of the Victoria Embankment uncovers a passage to an unknown realm, Langdon St. Ives sets out explore it, not knowing that a wealthy psychopath is working to keep the underworld's secrets hidden for reasons of his own. Assumed to be dead and buried beneath London, St. Ives lives secretly on the streets of the great city and investigates a string of ghastly crimes.