The film starts with a view of the carnival and taking the view to the window of a house, the police are later shown to be exiting the main door and it is revealed a babysitter and the two children were brutally murdered and ripped through bare hands. Teenager Jill Johnson (Camilla Belle)'s father Ben (Clark Gregg) has her babysit for a wealthy family to pay off the debt of going over 800 minutes using her cellphone, causing Jill to be grounded for one month. The unfortunate timing causes Jill to miss out on a school bonfire, which her best friend, Scarlett (Tessa Thompson), is attending. Jill arrives at the location. The parents (Derek de Lint and Kate Jennings Grant), show her around and tell her about their live-in housemaid Rosa Ramirez (Rosine Ace Hatem). Mrs. Mandrakis then gives Jill their numbers, stating that they won't be back until midnight. As the kids (Arthur Young and Madeline Carroll) are seen to be upstairs asleep, Jill soon begins to receive creepy anonymous phone calls from a stranger.