In Morocco, an English couple discovers a clay tablet covered in ancient writing. One day later, they are dead.

Called to North Africa to investigate, detective Chris Bronson follows a trail of clues that plunge him into a mystery that has gone unsolved since biblical times. Following a trail of clues alongside Angela, Bronson embarks on a trail that leads from the hustle of a Moroccan market to the deserted caves of Qumran; from the sinister echoes of a water-filled tunnel under the city of Jerusalem to a windswept fortress whose name spells death. In a deadly chase for the truth, Bronson and Angela are threatened on very side by violent extremists as they plunge into a mystery dating back two millennia. They soon discover that the stone they must find is older and far more dangerous than either could have ever imagined.