Absolutely fantastic! One step away from being a true masterpiece!

Rating: 9/10 (3 September 2014)

Note: I don't know how true this story is, I am only judging it as a movie. I think this movie is one of the best pure drama movies I have ever seen.
Acting: Top Notch all around, extra shout out for Mélissa Désormeaux- Poulin whom I thought was totally brilliant, so much so that I won't remember her real name in a few hours.
Characters: Well this is a drama so there isn't much variation but there is something to be said for realism. On paper the twins seem to go through a deeply involving emotional journey even though they come to terms with it relatively quickly its still well done. The beginning was relatively slow and we don't really seem to understand Jeanne very well, there is some sort of brilliant but subtle hinting with math(Euler's identity seems to be metaphorical) but its insufficient to understand the characters, only in hindsight, though this is excusable with Jeanne as she seems to be introvert. A little more on the relationship of the twins would have also been nice, as far as I am concerned they didn't need to be two different characters.
Plot: Since the movie was rather realistic its just a little bit disengaging if you take the discovery process of their mothers future to be so conveniently laid out in a progressive manner so at to leave the big shock for the end. This is the main reason I give this movie a 9 and not a 10, I believe some more thought on the timeline elements would have made this movie a true work of art.
Directing: Great and crispy camera work with some very good shots. At times the character moves about too fast, such as the orphanage, the scene were she visits the ravaged orphanage is a bit too quick and a little more camera work to help the viewer understand the extent of the war/hate would have been better.
random twist comparison: I keep drifting to Old Boy and trying to compare the use of the the same plot twist. I think its more excusable to reveal it in the end of Old boy because the plot causes the twist and the information about the twist is centrally controlled by the villain.
Conclusion: Great movie, probably not for the soft of heart though I don't find it particularly graphic but conceptually it can affect some people. Probably a good movie for starting controversial conversation topics afterwards.