586 BC. The Babylonians have ravaged the Holy Land, and Jerusalem has fallen. In desperation, the temple priests look to the greatest navigators ever known to save their holiest of treasures.
1943. A group of Allied codebreakers, under Churchill's direct command, work to stop a top-secret exchange. Yet even they know nothing of ancient artefact hidden on board a ship whose fate they have just sealed.
Present day. Exploring a wreck on the edge of the continental shelf, marine archaelogist Jack Howard and his friend Costas make a starling discovery. What they glimpse leads Jack to piece together the truth of one of the greatest ancient voyages of discovery, one whose real purpose he could scarcely have imagined. now he must fuse past and present in a terrifying showdown on a desperate mission for humanity.