Ambassadors to Canada tour a war plant: Ambassadors from Russia, Czechoslovakia, China and Chile visit a Bren gun factory, talk to workers. At the Noorduyn plant, the four men look at aircraft under construction. They are accompanied by Ralph Bell. At an armament plant they look over a four inch naval gun. They watch as turret is lowered onto a tank chassis in a tank plant. Various shots of welders at work on tanks. Ambassadors are Fedor Gusev, Russia; Liu Shih Shun, China; Francis Pavlasec of Czechoslovakia and Dr Edward Grove, Chile.