1351 B.C.
Akhenaten, the Pharaoh of the Sun, is the supreme ruler of Egypt... until the day he throws away his crown and mysteriously disappears into the desert, leaving behind a great secret.

1884 A.D.
A British officer serving in Sudan accidentally discovers an underwater temple dedicated to a terrifying religion whose god was fed by human sacrifices. The officer's secret mission is to reach General Gordon before the besieged Khartoum falls, but a well-hidden secret will change his plans...

In the present:
Jack Howard and his team are investigating one of the most astonishing underwater archaeological sites ever discovered and are led into a world three thousand years old that will put their lives at risk...