Dr. Conrad Jekyll, a scientist living in a secluded mansion, experiments with a serum designed to unleash humanity's darker side. Following his sudden death under mysterious circumstances, his nephew, Albert, inherits the estate and takes on the doctor's ongoing research. Albert soon discovers his uncle’s secret laboratory and becomes obsessed with continuing the experiments, unaware of their potential consequences. As he indulges in his newfound power, he transforms into a sinister alter ego, unleashing havoc upon the residents of the nearby village.

Meanwhile, several women in the village become entangled in Albert's twisted schemes. Lisa, his loyal assistant; Paula, a curious journalist; and Marta, a local villager with a dark past, each have their own motivations for getting closer to Albert. Their lives become increasingly perilous as Albert's experiments spiral out of control. As they uncover the true nature of Dr. Jekyll's work, they must confront their own fears and desires, navigating a web of deception and danger that threatens to consume them all. The film ends with a climactic confrontation, leaving the future of the estate and its dark legacy hanging in uncertainty.