Taiwanese horror movie from 1969.

Chong has been dedicating to run the Hotel Esquire for more than thirty years. Business is booming. However, a double room rented by a newly married couple is said to be haunted. Business thus declines sharply. Chong employs a private detective to look into the matter first, and then a taoist to play exorcism. But nothing has changed. One day, Chong and a tenant see a woman in weird dressing go into the room. They then plot to catch the backstage manipulator of this haunting event.

Scholar Qin Kun rescued a giant clam shell from a group of mischievous children, unaware that the shell was actually the true form of the clam spirit, Meiniang. At this moment, Qin Kun was targeted by the female demon of the Yin Wind Cave, his life hanging by a thread. To repay his kindness, the clam spirit offered herself to Qin Kun, becoming his wife. Together, they fought the female demon of the Yin Wind Cave time and again. Ultimately, they joined forces with the Taoist priest of the Upper Qing Palace to eliminate the demon. After accomplishing this feat, the clam spirit retired from her duties. Later, Qin Kun passed the imperial examinations and became an official.