The priest (played by Anthony Dawson) was a holy man who sought to rid the world of Satanism. He stole the titular demons from a cult and put them in a bag. Three cultists chased him through a forest. He went inside a gas station (or whatever) and spotted an open drum of toxic waste. He thanked God, thinking it was a sign and dropped the bag with the ghoulies, hoping to dissolve them. Suddenly, a flying ghoulie broke through a window and pushed the priest into the waste, dissolving him to bones.