It is the beginning of spring, and the beavers who are working on their dam are quite worried about the unusually low water level. After seeking help from the Great Eagle, Yakari and Little Thunder head to the high mountains to find the source of the problem. There, a wide-winged condor takes Yakari further up the steep mountainsides, to discover an enormous boulder in the water's way. Can the young Sioux move the massive rock?
—Nick Riganas