When the Titanic sank, it took a secret with it...
375 miles south-east of Newfoundland, the crew of a ship film an extraordinary event: the surface of the ocean bubbles as though boiling, covered with millions of fish. Then an enormous sperm whale roars through the water, before crashing down, dead, onto the surface. Within twenty-four hours, the footage has become a global phenomenon. The precise coordinates of the event are where the wreck of the Titanic lies some 13,000ft beneath. Engineer Kate Wetherall and her one-time boyfriend, marine archaeologist Lou Bates have been working together for almost a year - specializing in the scientific investigation of shipwrecks at the Institute of Marine Studies. Three days after the incident off Newfoundland, Commander Jerry Derham, head of a team investigating what the military have designated 'Marine Phenomenon REZ375', arrives to see them. They need to get a team down there fast to investigate. But none of them are prepared for what they find in the wreckage. Someone on the Titanic had been keeping a secret. One that might have cost lives, and that has remained trapped beneath the ocean for a hundred years. But now, there are those who would kill again to get hold of what one man died for in 1912...