In a university laboratory, during an archaeological excavation of medieval Irish culture, Professor Sheila Whelan (Marcelle Baer) and her assistants accidentally discovered a well-made box. They carefully opened the box, only to find an ugly and strange head inside. Even more terrifying was that the head let out a terrifying roar, which destroyed the laboratory equipment and caused varying degrees of damage to the personnel on site. However, everything was not over yet. Their hasty and reckless behavior released the terrifying banshee who had been sleeping for nearly two hundred years. Sheila and his assistants were followed by the banshee from then on, and terrifying incidents occurred one after another. According to an ancient Irish legend, anyone who hears the banshee's cry will soon die...