After being shown the wonders of nature by Grandmother Lom, two children venture out in her boat alone, find themselves in danger, and are rescued by a mysterious bird.
During the summer that Arlis spends with his grandparents in Vermont, his grandfather teaches him about loons, cross-country running, and responsibility, and when he returns home everyone finds out how much he has changed.
Describes the lifestyle and habitat of the swan, whooping crane, and loon; how the destruction of wetlands threatens their survival; and what we can do to save the animals.