 In two flashbacks a relic is created in 50 AD and then hidden by Jews from a Crusader mob in medieval Rennes-le-Château.In present-day Rennes-le-Château an academic under instructions from Magnus Martel is seen with the relic—the Loculus—researching on the ground to find the right place to hide it.Magnus' son Jake, an ace cryptographer, is released from Wormwood Scrubs and recruited by his father for research on the Loculus.