This film is about Canada's vast inland waters, its "second frontier," and a new breed of pioneer dedicated to exploring and protecting it. Post-war industrialization has affected the quality of our waters. To offset this ongoing process, the federal government set up the Canada Centre for Inland Waters. Teams of researchers and scientists travel the land, charting, experimenting, planning. Effective water management is the ultimate aim of the Centre. How aware are Canadians of their second frontier and of the life-supporting qualities of these waters?