Twenty years after they went their separate ways, friends and enemies are coming together for their school reunion. Katy, who is desperate to show that she's no longer the shy wallflower. Annabel, who ruled the school until a spectacular fall from grace. Zach, popular and cruel, but who says he's a changed man. And Robbie, always the victim, who never stood a chance.

As the reunion nears, a terrible event that binds the group together will resurface. Because someone is still holding a grudge, and will stop at nothing to reveal their darkest secrets...