A plague is destroying the world's population. The 'Gets makes people forget. First it's the small things, like where you left your keys ... then the not-so-small things, like how to drive. And finally your body forgets how to live.
But now an unknown substance with extraordinary power to heal has been discovered in the depths of the Pacific Ocean. Nicknamed ambrosia, it might just be the miracle cure the world has been praying for.
A research lab has been established eight miles below the sea's surface, but all contact with the team has been lost. Dr Luke Nelson's brother is down there and as desperation for a cure outweighs common sense, he agrees to descend through the lightless fathoms ... perhaps to face an evil blacker than anything he could have imagined.