In the labyrinthine streets of Paris, a scholar's quest for the truth leads him into the city's haunting secrets, where ancient forces and the dark gods of the abyss threaten to unravel reality....

In a labyrinthine catacomb beneath the ancient city, a series of mysterious deaths intertwines with a hidden truth about the cosmos, as a group of scholars races against time to solve the enigma of Yuggoth's resurrection....