Lili Reinhart stars as Daisy Morris, a social media content moderator who becomes obsessed with holding someone accountable after witnessing a violent crime in a video she's reviewing at her job. As she delves deeper into the mystery, her obsession spirals out of control, forcing her to confront her own mental limits and the dark reality of what's online. The film follows Daisy's journey as she navigates the blurred lines between justice and violence, and ultimately finds herself in a cat-and-mouse game with the person from the video.