The novel “The Dragon in the Sea” by Frank Herbert was published for the first time between 1955 and 1956 serialized in the magazine “Astounding” with the title “Under Pressure” and as a book in 1956.

After more than a decade, the war between the Western bloc and the Eastern bloc has led to a scarcity of resources. The West started using specialized nuclear submarines to steal the East’s oil infiltrating into enemy territory to go pick it up directly into the undersea oil fields.

The Eastern bloc successfully started infiltrating enemy agents in submarine crews, made up of four people. The result, together with the danger of their missions, is that twenty submarines have disappeared. John Ramsay is a young psychologist trained as an electronic operator who is assiened as part of a new mission to find the enemy agent and figure out how to prevent others go mad.