The role played here is that of an alien female, with Scarlett entering the skin of a terrestrial young woman coming to our planet on a mission to kill. Driving a truck, she wanders the city of Edinburgh and its suburbs in search of men whom he lures (something that us not too difficult even for an alien who entered under the skin of Scarlett Johansson) and then kills and dips them in a bath of black substance in which they enter without seeming to be aware of the danger. The goal is enigmatic to the crime film watchers, those who are really interested in a possible explanation of everything who will find it documented in the novel that inspired the book which is written, by the way, in a lighter style, very different from what we get on screen.
https://www.youtube.com/watch?v=io92j2qqEGk
(video source Clevver Movies)
The spiritual and emotional worlds of the serial alien murderess and of the terrestrials seem completely disjoint at the beginning. As the action slowly progresses, change happens. The main character seems to begin to be interested in the motivations of the acts of humans, in the strange mixture of empathy and indifference, of love and hate which makes each of us. Which of these aspects will prevail, and who eventually is the more more dangerous of the species – I will let those who plan to watch the movie to guess. I will only say that, despite the slow pace and the fact that the film is hard to fit into the classical genres of ‘science fiction’ or ‘movies with aliens’, or even ‘horror films’, attentive and patient viewer swill be rewarded a superb acting performance by Scarlett Johansson, and the screen presence of extras surprised by hidden camera when climbing up in a truck driven by Scarlett; by a bleak but beautiful cinematography; and by a maybe ambiguous message which ends by asking questions about ourselves, the human species.