A young woman studying the habits of webcam chat users from the apparent safety of her apartment witnesses a brutal murder online and is quickly immersed in a nightmare in which she and her loved ones are targeted for the same grisly fate as the first victim. 一位研究网络摄像头习惯的年轻女性从她公寓的安全问题上与用户聊天，目睹了一起残酷的谋杀案，并迅速沉浸在一场噩梦中，她和她所爱的人成为第一个受害者同样可怕的命运。