In the Qingyun Mountains lives a male green snake who has cultivated for hundreds of years. He has intelligence and magical powers, and though hot-tempered, he is kindhearted. He usually feeds on the spiritual energy of the mountains and forests. Unfortunately, a snake catcher captures him, but a girl happens to rescue him. Deeply grateful, the green snake wants to go down the mountain to repay her. When he finds her, he discovers that she has had a tragic life.
