Constantinople, 1204: the imperial city is razed to the ground by Crusaders - the streets awash with blood.
Modern-day Istanbul: an elite group of archaelogists uncover the grave of Enrico Dandolo, once Doge of Venice, and leader of the bloodthirsty Fourth Crusade. They seek a legendary document that reveals the truth behind the Doge's rumoured secret links to the Templar knights.
Days later the team vanishes without a trace. All that remains in the ransacked grave is a strange key inscribed with an ancient code.
Special Operatives Jack and Laura are called in. And very soon they find themselves battling against an ancient enemy in a life-or-death race against time.
The dark secret of Dandolo's tomb - and his mysterious link to the Templar knights - is about to be revealed.