On the trail of the Cathars' secret.

A grand opening night at the Metropolitan Museum in New York, where the fabulous treasures of the Vatican are on display. Suddenly, riding abreast, four knights in Templar costumes sow apocalypse among the long gowns and tuxedos. In a matter of minutes, the exhibition descends into carnage.

Taking refuge behind a glass case, Tess, a brilliant archaeologist, witnesses the looting. She quickly develops the feeling that these horsemen, who disappeared into the darkness of Central Park, are far from being simple criminals; they have a connection to the true story of the Templars. Only Sean Reilly, an FBI agent, trusts the young woman's intuition. Together, they will investigate the mystery of the Templars. Didn't these soldier-monks hold a secret that, if revealed, could have brought down the Vatican, the Church, and all of Christianity? Tess and Reilly will have only a few days to uncover this secret before others seize it.