Spring in the High Sierras.
Though they cannot see all that is going on in the wilderness below them, they know all about the plants, birds, and animals in each of the five life zones.
The rangers are sure that a fire will break out in the dry foothills at any time, endangering the lives of the thrashers and towhees, snakes, mice and coyotes who make their home there. Higher up, snow patches the meadows, although spring has arrived, and amountain lioness watches her two kittens at play. A red-tailed hawk and golden eagle, soaring gracefully, hunt their prey. And on the highest peaks, snow and ice are locked in giant glaciers.
As the rangers search for the lost hiker, young nature lovers are introduced to the High Sierra community and the infinite variety of wildlife it supports.