The story is about a relationship between a young cow herding boy with an extraordinary flute playing ability. He is accompanied by his faithful water buffalo, and falls asleep in a tree. The first month of summer morning, in the south field, a naive lively shepherd boy rides the water buffalo to browse. The cow has suddenly been missing, originally the cow is drown on the waterfalls, which ignores the shepherd boy's call for back. Hearing the sound which is sent out by the windy bamboo, he has the comprehension, then truncates the bamboo into a flute, plays the melodious delightful music. By the attraction of the whistle sound, the water buffalo is back to the shepherd boy side. The shepherd boy riding the cow back is treading the twilight boundary ridge between fields, easily returns.