An Italian spy infiltrates a weapons factory in Germany.
Walter Noss is ruined trying to find malleable copper to make material for German torpedoes. One day, in a secret compartment of an old chest, he finds a document from an ancestor describing the formula for this malleable copper.
A secret deal over a iron ore mine brings two adventurerers from Europe to Colombo, Hong Kong, Macau, and Kyoto followed by a spy, who wants to close the deal for himself.
