Moebius(2021)

Moebius is a Spanish investigative thriller set in the quiet Catalan village of La Farga, where a student's disappearance sets off a chain of troubling revelations. When new math teacher Mamen takes matters into her own hands—operating outside official channels—she uncovers dark secrets that have been hidden beneath the village's peaceful surface for years. As she digs deeper, the investigation becomes increasingly dangerous, forcing her to confront the community's uncomfortable truths and her own vulnerability in a place where answers come at a cost.