In an underwater cavern off the coast of Marseilles are the first human engravings known to man. Among them is a crude drawing of a three-fingered hand. Is it a hunting signal or is it evidence of ritual amputation in a Shamanistic world?
The one who names himself 'The Hunter' apparently believes the latter. De Palma heads to the University to investigate, but the clique of pre-history professors he encounters are as secretive as the cave-drawing itself. Slowly and alone, de Palma unravels a mystery that dates back to the Ice Age, and comes closer to discovering the killer's identity.
