Puella Magi Madoka Magica the Movie Part I: Beginnings
劇場版 魔法少女まどか☆マギカ [前編] 始まりの物語 (original)
Starring Aoi Yuki, Chiwa Saito, Eri Kitamura, Kaori Mizuhashi, Ai Nonaka, Emiri Kato, Ryoko Shintani, Yuko Goto, Tetsuya Iwanaga, Junko Iwao
It's a animation and mystery movie, and has a rating of 7.6 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Denmark.