Beneath layers of volcanic ash lies the Villa della Notte - the Night Villa - once home to the captivating slave girl at the heart of an ancient controversy. And concealed in a subterranean labyrinth rests a cache of antique documents believed lost to the ages: a prize too alluring for Sophie to resist. But whatever shocking events transpired in the face of Vesuvius's fury has led to deeper intrigues - and Sophie is swiftly sucked into their dark and terrifying vortex . . .