A documentary account of the five-week visit of Princess Elizabeth and the Duke of Edinburgh to Canada and the United States in the fall of 1951. Stops on the royal tour include Québec City, the National War Memorial in Ottawa, the Trenton Air Force Base in Toronto, a performance of the Royal Winnipeg Ballet in Regina and visits to Calgary and Edmonton. The royal train crosses the Rockies and makes stops in several small towns. The royal couple boards HMCS Crusader in Vancouver and watches Native dances in Thunderbird Park, Victoria. They are then welcomed to the United States by President Truman. The remainder of the journey includes visits to Montreal, the University of New Brunswick in Fredericton, a steel mill in Sydney, Nova Scotia and Portugal Cove, Newfoundland.

This film probes the perennial miracle of the growth of a seedling, the seasonal upsurge of life in a forest giant, and the mysterious alchemy of a single leaf. Presented in magnified dimension through time-lapse photography and animated diagrams, a maple leaf and segments of a tree serve to illustrate the physiological processes that go on in all plants.