In modern London, Detective Grayson Steel works on Scotland Yard's most uncomfortable cases.

While investigating the mysterious death of a young woman, he discovers secrets that normal people are oblivious to, and is dragged into a hidden society that exists alongside the human world. The Nebula Convicto has to deal with secret councils, magical assaults and beings which usually only exist in fables and myths.

Within this magical community, Steel is supposed to take on the role of a special investigator in order to find a girl who has been kidnapped as quickly as possible. If he doesn't succeed before a new leader of the Nebula Convicto is elected, the whole world will descend into the Dark Ages…for a second time.
His abilities as an investigato and his newly discovered power to resist magic will help Steel find his way through the London underground amongst ghouls, vampires and other magical creatures.