A couple of days have past and no one knows where Phoebe is. Then one evening on the news they announce that there has been a murder. A CCTV camera reveals that the killer is 'Phoebe'. Everyone then assumes Phoebe is a murderer and that is the reason why she hasn't been home for the past couple of days. When the killer returns to Phoebes home the family act as if nothing has happened but eventually when their next door neighbour is found dead in his conservatory Phoebes mum confronts her about the murders. The killer then lashes out and kills Phoebes mum. The killer then leaves that night leaving a note saying that no one is safe and that they should watch their backs.
Phoebes best friend Naomi confronts her and asks her why she is killing everyone. The killer replys by saying she isn't Phoebe and that she killed Phoebe 2 weeks ago and dumped her body at the old mine. Naomi realises the danger and gets her friends and Phoebes brother and sister to all go to a hide out knowing none of them are safe.
Typically the killer finds them and goes about killing them all. Many of Phoebes friends are killed and eventually it is just Phoebes brother, Tom and Naomi left alive.
After a very long night of horror Naomi stabs the killer but not before the killer stabs Tom. As both Tom and the killer lay dying at the old mine Naomi asks where Phoebes body was dumped. The killer points a black bag. Inside it Naomi finds a couple of teddys which belonged to Phoebe. She realises what has happened and runs over to the killer. Minutes from death, Phoebe realises she has killed all of her family and friends. We see a flashback of Phoebe in bed having a nightmare. She awakes screaming but then turns to look at a photo of her boyfriend who we discover was the first person she killed and that the day before she had discovered he cheated. We find out that Phoebe is schizophrenic and the dream she was having was of her 'double' killing her (the opening sequence). We discover she wasn't really killed it was just her bad side killing her good side and that is the reason she was killing people.
Phoebe then apologises to Naomi and Tom and dies in Naomi's arms.