Moebius
뫼비우스 (original)
To get revenge on her cheating husband, an enraged and disturbed woman disfigures their teenage son in horrifically fitting fashion.
Starring Cho Jae-hyun, Lee Na-ra, Seo Young-joo, Kim Jae-hong, Kim Min-seok
It's a drama and thriller movie, and has a rating of 6.4 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Denmark.