Sing (2016)

Set in '90s Budapest, Young Zsofi is having a hard time fitting in at her new school, and her trouble grows when the director of the award-winning choir treats her cruelly. But she loves singing so she perseveres. However, she and her friend Liza begin suspecting something sinister may be behind the revered teacher, so they investigate and uncover an ugly and deep-rooted truth.

Inspired by real events.