In the darkest hours of the night at the Museum of Volterra, young archaeologist Fabrizio Castellani is immersed in his work. He has discovered that the famous Etruscan statue known as the 'shade of twilight' contains a mysterious object, seemingly enclosed within the sculpture itself. He is suddenly interrupted by the phone ringing - on the other end of the line an icy female voice warns him to abandon his research at once.A series of gruesome killings follow. The victims, who have all been involved in the desecration of an unexplored tomb, seem to have been torn to pieces by a beast of unimaginable size. Meanwhile, as Fabrizio excavates the Etruscan tomb he discovers something extraordinary, and chilling . . .Will Fabrizio manage to unravel these secrets without being sucked into the spiral of violence himself?