Who's A? Toby or Jenna? Or Both?

The anonymous "A" has not stopped sending all the girls messages and threats. They are becoming very worried, and suspecting everyone around them; even eachother. Since Allison had gone missing they had tried to forget so much about their past, but unfortunately three years later, it's all coming back. The worst part is the incident all the girls caused, including Allison, a couple nights before she went missing.

The five friends were trying on clothes at one of the girl's houses during a sleepover. Then Ali sees someone staring at them through the window. She thinks it is Jenna's brother, who lives down the street, trying to catch them naked. So, to get back at 'him', Ali suggests they take some fireworks, light it, and throw it in the garage where she saw 'him' run for cover when she saw him. Allison went across the street and throws the firework into the garage and it blows up and sets the garage on fire. It turns out it was Jenna looking at them through the window. She was wishing she could be friends with them. She didn't want them to think she was a stalker, so she hid in the garage....Unfortunately, the explosion caused Jenna to become blind. The whole town, including Jenna, thought it was an accident.