Story line(changed)

A teenage girl went up to her attic in search of her math book and then comes across a USB stick, she decides to take it it school with her the next day. The second day shes at school, showing dedication, but really was disturbed by what could be on the USB. She couldn't wait any longer so she takes it out of her bag, and whet to the nearest computer, leaving her unaware study partner on her own, she checks it out and find several disturbing pictures with a video.