Next to Me (2015)

Olja is a high-school history teacher married to a painter whose latest exhibition provoked violent reactions from Serbian nationalists. One night, a group of masked hooligans attacks her. They film the attack and upload the clip to YouTube. The next day Olja discovers that some of her students were responsible. She takes away their mobile phones and hastily decides to lock them in the school building, then disconnects the school phones and the Internet. Trapped in the school, students start to communicate with one another to try to solve the problem together. That night, a generation that was written off before they were even given a chance learns more than they expected about themselves and their classmates.