Paranormal Activity 3 is a 2011 American supernatural horror film directed by Henry Joost and Ariel Schulman. The prequel to the Paranormal Activity franchise, it takes place 18 years before the events of the first film. The story follows Katie and Kristi, two young sisters who are being filmed by their parents as part of a family project documenting their daily lives. However, things take a strange turn when they start to capture evidence of an invisible entity lurking in their home. At first, the sisters are skeptical and dismissive of the presence, but soon they begin to experience terrifying and unexplained events. As the activity escalates, Katie starts to sense that something malevolent is at work, trying to communicate with her through subtle noises and movements. Kristi, on the other hand, seems more accepting of the entity's existence and even begins to form a bond with it. As the sisters' behavior becomes increasingly erratic, their parents are left to wonder if they're just imagining things or if something truly paranormal is at play. Throughout the film, the found-footage style camera work adds to the sense of realism and immediacy, making the viewer feel like they're right there with Katie and Kristi as they navigate this terrifying experience. The tension builds slowly but surely, culminating in a heart-stopping climax that will leave even the most skeptical viewers on edge. Paranormal Activity 3 is a clever prequel that expertly weaves together the events of the first two films to provide a chilling backstory for the franchise's protagonist, Katie. With its blend of psychological suspense and supernatural horror, it's no wonder this film has become a fan favorite among fans of the series.