if annie didn't kill herself, then who did?

COMPLETED// How can a 20 minute video change your life? This is what Annie, Katie, Caleb and Brennan ask themselves as a field day youtube video is filmed. Emotions change and feelings are developed for one another. After the video everyone thinks everything will be fine, will it? After a drastic event changes most of their lives for ever how will they cope with daily activities and most of all maintaining their relationships? //

Bella and Caleb have a history.Simple as that.They're still friends even though they dated. When Bella and a bunch of her friends move in together,along Caleb and a few extra guests,what happens?