A poor scholar named Lo Chih-Chiu, played by Anthony Wong Yiu-Ming, rescues a swallow from three mischievous boys, and frees the bird afterward. The bird then magically takes the form of a beautiful lady named Hsiao-Hseuh, played by Cherie Chung, who falls in love with the scholar because he had saved her life. She returns the deed by rescuing him from a ruthless band of warlords. She and her sister, Hsiao-Shang, are both originally swallows, but can change into human forms due to witchcraft and
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