I found the movie very interesting and well thought out, there is a parallel plot going on with the 70s Benjamim and Castana, which connects to his present "relationship" with Ariela. No matter the interpretation of Ariela's true character, the viewer can link scenes of Castana's assassination to Benjamim's by Castana's child crying, which is Ariela. What confused me is ongoing frustration that Ariela encounters when trying to write to her mother, who I thought was Castana, but the scene where she is murdered, Ariela is very young, yet she looks to be in her mid-twenties when she receives a note that says her mom died. I interpret this as the government trying to hide the fact that they actually murdered her mother. All in all, a great movie.