Kim Kendall and his brother Hawk hoped to sustain their father's reputation of being a top-notch woodsman and guide. The older man had crashed in a plane wreck in the north woods and the boys had to carry on for their mother. It was therefore with careful preparations that they undertook to take two Boston boys way off into the woods on a fishing and camping expedition into the Kekekabic country of Minnesota. Although both were young, they were licensed guides and soon found that they had to walk three miles to the Easterner's one, for they had to handle all the carries. There is a mystery on Eddy Lake, they hear human cries, find foot-prints and have some of their equipment stolen. The creature in the cave turns out to be their father, who had escaped from the burning plane but had lost his mind though not his knowledge of woodcraft. The meeting brings back his sanity. Boys who have been camping this summer will enjoy this.