"Das Lehrerzimmer" (The Teachers' Lounge, 2023)

Carla Nowak is the new teacher at a local high school. When she discovers a series of thefts, she decides to investigate. As she tries to get to the bottom of the problem, most everyone around her—colleagues, parents, students—tries to stop her. When one of her students’ mother becomes the chief suspect, Carla resorts to methods that set her off on a road of no return. 

In German, with English subtitles.