The Attachment/A Dark Past (S01E07)

After a young student relocates to her boyfriend's home, she stumbles upon a strange soundproof room hidden away in the basement. Soon, she realizes that a malevolent spirit, intent on keeping her boyfriend for itself, has set its sights on her. As eerie occurrences escalate, she must confront the dark history of the house and the jealous entity that threatens to tear them apart.