Englishman and amoral occultist John Constantine has been out of sorts lately, disconnected from himself...and this time not from another bender, but quite literally, as his soul is cast adrift during a fouled-up spiritual quest in an Iranian monastery. Now rescued and recruited by an agent for the Hidden World—the supernatural realm that exists far beyond everyday mortal awareness—Constantine and his extraordinary allies are forcibly dragged into a globe-spanning conspiracy. For the secret cabal known as the Servants of Transfiguration has set in motion a horrifying plot to raise the ancient demon god known as the War Lord—and bring about a last great war that will annihilate everything on Earth....

Tonsell-by-the-Stream, a sleepy little village outside of London, is suddenly swallowed down into the earth through the hellish machinations of an ancient, ominous force. At the behest of an extraordinary supernatural agent—and in exchange for the life of his best friend—down-and-out and amoral occultist John Constantine must venture deep into underground shadows to investigate this cataclysmic occurrence. But unbeknownst to Constantine, something beyond his worst nightmares awaits below—the deadly and phantasmagorical realm of the Sunless . . . a terrifying world where the Gloomlord rules over all with a sadistic and merciless hand, and Tonsell-by-the-Stream was only his first target on the surface world...