Buried treasure, mysterious deaths, looting, forged documents, secretive Swiss bank vaults and shadowy intermediaries. This is not a description of a Dan Brown thriller. It’s real life: the trade in illegally exported antiquities. As prices soar into the millions of dollars for the top pieces, so does the incentive to dig up treasures in Italy, Greece, Turkey and farther afield, pass them to “runners” who will sneak them illegally across borders, store them in a Swiss vault and then quietly slip them into the trade. The players in this murky world can make a fortune, but this is a dangerous game.