The movie begins with Elizabeth logging into a webcam-based social media site known as The Den, which allows users to chat with random strangers across the world, similar to Chatroulette.
For her graduate project in sociology, she proposes to chat with as many strangers as possible and calculate how many meaningful conversations she can accumulate.
Later, Elizabeth is prompted to chat with the stranger again; the stranger reveals that they witnessed Elizabeth having sex, and later their webcam turns on and reveals the account holder bound and gagged before being murdered by a masked man.
Elizabeth is shaken and immediately takes the video of the murder to the police, who acknowledge that it appears genuine but advise her that such snuff films are usually faked, and there is little they can do about it.
Elizabeth calls for help from the officer guarding her, but she finds him murdered as well.
Afterwards, Elizabeth's account is hacked, and her webcam is repeatedly turned on without her permission.
Though Elizabeth implores the police to investigate, they tell her that there is nothing that they can do.
Meanwhile, Jenni is lured to Elizabeth's house by the hacker, who pretends to be Elizabeth and abducts her when she arrives.
Though Elizabeth notifies the police and calls Lynn to warn her, the message is garbled.
The attackers bind Lynn and prepares to cut open her stomach, but abruptly leave, hiding the camera as they do so.