May 1914. Two diplomats hurry home by sea and rail, each carrying a document of world-changing importance. Then the liner Empress of India is sunk in a collision, and the Manhattan-Line express plunges from a bridge - both dragging their VIP passengers to watery oblivion. Tragic coincidence or conspiracy?

In the energy-starved, fear-torn 1980s, Dirk Pitt discovers that those long-lost papers could destroy whole nations, throwing him into his biggest challenge yet. Racing against hired killers, he launches his revolutionary deep-sea search craft and faces the horrors of the sea bed to hunt for the documents. 'Night Probe' has begun . . .