India. 1879. Lieutenant John Howard witnesses something so unspeakable it changes him for ever. His subsequent disappearance is never solved. Egypt. Present day. Marine archaeologist Jack Howard makes an astonishing discovery on a deep-sea dive. What's the connection? Jack Howard doesn't know yet. But he's about to find out.

This isn't just a treasure hunt; it's a desperate search for the truth. A truth that will unlock the mystery of Jack's great-great grandfather's disappearance. A truth so compelling Jack's pursuit is almost unstoppable. Almost. A formidable enemy from Jack's past has appeared in his present, and this enemy will stop at nothing to protect its earth-shattering secret.