- FBI agent Pendergast and his demonic brother, Diogenes, continue the savage tango begun in "Dance of Death". Diogenes returns the stolen gem collection of the New York Museum of Natural History, but this hoard of priceless jewels has been reduced to mounds of powdery dust. To neutralize the bad PR, the museum reopens the Tomb of Senef, an ancient Egyptian temple that has remained behind closed doors since the 1930s. For Diogenes, however, the new exhibit only raises the ante of his psychotic sibling feud.