An organization known as Tenet hires the Protagonist, played by John David Washington, as a global disaster looms. The Protagonist is joined by Neil, played by Robert Pattison on his mission to prevent catastrophe. (inews.co.uk)
I don't like this kind of time-travel movie because this never happens in the real world for now so it's hard for me to imagine when I watch it.
I didn't understand completely for the first time so needed to watch it again maybe two.
Finally, I watched it three times and understood the story. Maybe too slow to understand. But every time I picked up some points that I had missed at a previous time.
Recommend to watch this when you are not in a rush and have time to think.