AERIAL SHOTS of lakes and forests in northern Manitoba, of houses and farms on islands, of a river passing through lands, of a large and long track of cut trees. Shots of a road, of a camp and of a settlement. Hazy shots of a river with forests on sides and lake, afternoon sun reflecting in it. MSs of an hydroplane moving slowly on a lake with a woman walking out of it, standing on a floater with an icepack, tree leaves in foreground. MLS of the hydroplane taking off and flying away. Various shots from different angles of same woman, biologist of the "Freshwater Institute", walking out of plane on floater, taking out the icebox with large water samples bottle in it, of the biologist lowering it at different depths and taking samples from it.