France, May 1940. As the German army blitzes Europe, a curator must take a mysterious cargo out of the country. When his intended ship sinks, his cargo’s uncertain fate rests on a decrepit steamer, sailing under German fire. Decades later, a diving expedition leads Dirk Pitt to a shipwreck’s cache of uncut diamonds. No sooner than discovered, the diamonds are stolen, all while vital water treatment facilities around the globe are being targeted, placing humanity in grave peril. Only Dirk Pitt can locate the treasure that will preserve the soul of a nation and save the world from catastrophe.