Cuckoo (2024)

Seventeen-year-old Gretchen reluctantly moves to a resort in the German Alps with her father, stepmother, and mute half-sister, Alma. Gretchen soon starts to experience disturbing visions and encounters a hooded woman, while Alma suffers seizures triggered by strange screeches. As Gretchen unravels the truth, she discovers that the hooded woman is hiding a terrible secret, and Alma is not who she seems.