The acting performance of Natascha is both the young and the older role so moving that the audience of the first identified until the last minute with the situation. It is this seemingly hopeless situation between the powerlessness against the torturers and the few moments of hope leaves the viewer in plain disbelief solidify.
I personally flew thoughts like "Something like this is really possible?" and "If I would get their hands on ..." as the edge motions always through your mind when the uncontrolled violence of the kidnapper left by his sociopathic everyday perception imagine a kind of self-justification towards the victim.
Generally it is said that it is a serious tragedy is their representation in the movies imperious context saving only core elements of what has happened process can- but details like the proverbial 'victimhood' were (the humiliations written on toilet paper and collected rolled) and the enormous period (8 years imprisonment in a confined space and the break with Maslow Beduerfnistheorie to the lowest physiological needs level) incorporated skillfully.
Perpetrator and victim occur in an absurd context in turn a kind of normalcy erreichen- a perspective which beats the unprepared viewer like a hammer on the head.
Personally, I have rarely seen a movie that was so difficult for me to digest that I had to pause several times shortly. 5 stars for the technical and theatrical transposition. I would also give a star additionally.