Ali (Alison) wanted to play a prank on Toby since he always spied on all the girls. Ali wanted to shoot fireworks at his tree house to be a joke. But it went very wrong with a smoke everywhere and someone got hurt but it wasn't Toby.
Jenna (Toby's sister) got hit with the fireworks. The ambulance rushed to take Jenna to the hospital and Ali realized what she had done.
Ali accidentally blinded Jenna which hit her in the face. Ali read it load and clear to everyone so they knew the truth.
All the girls (Emily, Hannah, Aria, Spencer, and Ali) went camping. All the girls were talking about there bracelets that represent Jenna's accident. A few hours later Ali disappeared. Or did she die?
Spencer was the first girl in the group to get the text message from "A". Then all the rest of the girls were getting text messages about there deepest darkest secrets. Was this all because of Jenna thing?
It's official. Ali was dead. Its been four years since her death and the girls stopped taking to each other. But they all did know something about Ali that only they kept with her.