In a small Italian town, a mysterious killer spreads terror among the inhabitants, leaving a trail of corpses that awakens an unsettling suspicion: their deaths seem to be connected to an ancient myth about vampires. As rumors about creatures of the night proliferate, a determined investigator, the police lieutenant, begins to unravel a dark secret pointing to a nocturnal cult that worships a powerful vampiric figure.
The plot thickens when the lieutenant finds himself trapped in a mind game with a stunning woman, whose beauty and interests immerse him in a spiral of attraction and danger. As he delves deeper into the mystery, he discovers that the legend of the vampire is not merely a gruesome tale. With the help of a group of scientists, he starts conducting his own investigations, but each new finding pushes him further away from the life he once knew.
Chaos ensues when the cult reveals its true nature, and the lieutenant faces not only a relentless killer but also his own fears and desires. Set against a backdrop of tension and seduction, the climactic final confrontation unveils the thin line between the real and the supernatural, leaving the question of what is truly human in a world where fear can wear the most seductive face. This haunting blend of mystery and horror is a journey into the dark side of human nature.