Since there was no relevant review about this movie I decided to watch it and do it myself.
"Painless", this is a 2012 film directed by Juan Carlos Medina, this is the type of movie that tells two different stories in two different times and ultimately everything is related (such as Vantage Point).
The first part tells the story of children who cannot feel any pain, especially one called "Benigno", who is a child that stands out from others for having "something very special" and focuses on the years of the 1,930's at the height of the Spanish Civil war, though the trailer may give the impression that this is a movie where there are rituals, Satan and witchcraft (at least that was my impression), after seeing the movie you realizes that the title has a deeper meaning.
And the other part it tells the story of "David" a man suffering from leukemia and needs a transplant of... "something" that only his parents can give him, and when he does he start to revealing the dark past of his family, this part focuses more or less in the year ... 2012?
I gotta admit that there were parts where I was "lost" because this movie is ... well not completely but there are parts where they speak 3 languages: Spanish, German and I think Catalan. And although I have no problem with it, because as any fan of the movies I see movies in their original language (even if I do not understand a freaking thing), you can always activate subtitles. Overall the film is filmed very well there is suspense, and there are moments of "what's gonna happen?". I liked to film, though I "shut down" almost at the end of the movie, but I gained strength at the end when "Berkano" appeared, if you want to know what's that you gotta see the movie. I am surprised that it doesn't appeared in Wikipedia or Rotten Tomatoes. This movie reminded me of Guillermo del Toro's "The Devil's Backbone".