Amelia Otterchild Mackenzie has never seen a horse until the great red stallion Firefox rescues her from drowning. Soon her natural skill with horses becomes clear. Could this be the key that will lead motherless Amelia to her missing father, a legendary horseman? Amelia and her beloved sister set off for the rough far west of Canada to find their father, with the few treasures. But with white-water rapids and wild animals to deal with, their river journey is a dangerous one ...