In Rome, a sadistic serial killer begins stalking and murdering sex workers, leaving the community terrified and the authorities struggling to stop the violence. After several attacks, four women—Lena, Angela, Nadine, and Stella—decide they can’t wait to be the next victims, and band together to protect each other and take a more active role in the search. As police pressure mounts and the women start digging for clues on their own, the hunt turns the city into a tense web of fear, rumors, and suspicion.