It was set in somewhere with accent kind of like Scottish or Irish, I think it may have been welsh. Anyway, this lady, i think she was a psychiatrist, went to this small town to help a creepy blonde girl who seems to have multiple personalities. But it turns out that it is the ghosts of three local teens how had died when they were ran off a bridge after attending a festival where the only girl in the group was raped by men from their town. I think the townspeople end up killing the psychiatrist and the blonde girl begins channeling her. Please help! I forgot the name.