http://www.imdb.com/title/tt1153111/highly recommend this film--the young actress, Marianne Fortier, is amazing--look out for her! She captured a 1950's fifteen year old very accurately: childlike sometimes, a woman sometimes, a sister, friend, daughter. Makes me want to find her only other film, Aurore (2005).
The other actors are good also, especially that playing her youngest brother, Hugo St-Onge-Paquin.
The script is believable, engaging and not predictable.
Go beyond any aversion you may have to subtitles on this one, it is worth your time.