This short documentary studies the contrast between the sedate Toronto of the turn of the century and the thriving, expanding metropolis of 1951. Aerial views give evidence of the conversion of the old Toronto into the new--the city with towering skyscrapers, teeming traffic arteries, vast industrial developments and far-reaching residential areas housing over a million people. Toronto's mid-century progress is also Canada's, as manifested in the building of Canada's first subway, and in the bustle of the nation's greatest trading centre--the Toronto Stock Exchange.