Lin Chang'an casually splashes water, awakening a spirit snake inside a fish bone. Following the red fish's guidance, he rescues a green snake suffering excruciating abdominal pain after being injured while undergoing a heavenly tribulation. By accident, he touches the Snake Clan's Peach Blossom Grove and forms a lifelong bond. Qingling promises to obtain half a ginseng plant to restore the sight of Chang'an's mother, who has been blind for seven years. Once healed, she takes human form, comes to his home to marry him, and the two devote themselves to caring for his mother. However, rumors spread throughout the village. Someone secretly drugs Qingling to force her to reveal her snake form, attracting a Taoist priest to investigate. As prejudice against a human marrying a demon mounts, Lin Chang'an risks his life to protect his wife. In the end, good and evil are judged by the human heart.