This film is extremely visual. It is difficult to describe in words without running the risk of losing or boring the reader.
I have come up with a simplified summary, therefore, like a readers guide, which will conjure up the images in as few words as possible :
- the beginning is Leon: The Professional
- the middle is Inception
- the end is 2001: A Space Odyssey
Don't interpret this as pretension on my part, merely a visual, emotional and philosophical point of reference.