Río Oscuro(2019)

Río Oscuro is a Spanish thriller following a mother who takes justice into her own hands after her son vanishes. Frustrated by the police's inability to find him, she travels to a remote, mysterious town where he was last seen. Determined to uncover the truth, she begins her own investigation into the dark secrets the community guards. As she digs deeper, she discovers that nothing in the town is as it seems, and her search becomes increasingly dangerous. Río Oscuro blends family drama with suspenseful mystery, exploring themes of maternal desperation and corruption in small-town Spain. The series builds tension through her relentless pursuit of answers, even as those around her work to keep her from the truth.