A mysterious document has been stored at the bottom of the ocean for almost a hundred years. The US government is ready to do anything to get him back. The British government dreams of destroying it. And now Washington has finally decided to finance an expedition to retrieve the document. But how to do this? Breaking through kilometers of ocean water is not easy and deadly. The famous oceanographer Dirk Pitt is undertaking to obtain the document. But in London, very powerful people understand that the document should not get into the USA. And then the famous British intelligence officer Brian Shaw receives an order to stop Pitt. At what cost? No matter. The Secret Services have always believed that the ends justify the means.