Nico, a troubled policeman, returns to his remote hometown after years away to say goodbye to his dying mother, Eleonora. Around the same time, mutilated bodies begin appearing in the surrounding woods — displayed as warnings, and bearing marks no human could have left. As the police close in on Nico as their prime suspect, he himself starts to fear what he may be capable of, sensing a darkness growing within him. Searching his mother's home for answers, he uncovers a long-buried truth about his father — and about his own blood. Guided by Professor Moreau, a cryptic old family acquaintance, Nico must choose between denying his true nature and unleashing it.