The film centers on Kelly-Anne, a young woman seemingly captivated by the ongoing trial of Ludovic Chevalier, a man accused of the horrific murders of teenage girls, live-streamed in online "red rooms." She attends the court proceedings daily, observing intently, while also leading a parallel life online where she interacts with communities fascinated by the case and navigates the dark web. Her path crosses with Clémentine, another young woman deeply affected by the trial, leading to a fragile connection. As the trial progresses, Kelly-Anne's behavior becomes increasingly obsessive and morally ambiguous, blurring the lines between detached observer and active participant in the digital darkness surrounding the crimes.
—Angel