Tenet (Christopher Nolan) *spoilers from post 475*

It began at a concert hall. It's curved in shape, felt more oval than circle.
Somewhere Eastern European (possibly Ukraine) or Russia. Everyone speaking non-english.
People can easily float in an out to their seats as there is no wall on the ground level.
Then it's revealed to be because a metal looking mechanical wall drops from the ceiling after everyone has taken their seat.
Dudes with guns (Terrorist Cliche) rush the stage and audience and take over.

We're inside a van outside the concert hall. A cop van. Two dudes dressed as cops speaking non-english.. say to wake (.. yes Wake..) the Americans.
A bunch of dudes dressed as cops BUT missing their insignia badges are asleep in the back and begin to wake up.
Cops insignia badges for these local cops are given out to them.
SIRENs Approach. They wait for the other cop vans to arrive.

outside the van]
The other cop vans are unloading large numbers of armed cops charging towards the concert hall. Our van bursts open and 'The Americans' burst out and easily blend into the charge as they are dressed just like all the other cops.

back to the lowered mechanical wall]
The actual cops start feeding in sleeping gas and prepare to breach. The Americans are holding just behind them.
Some of the dudes with guns inside have gas masks and/or pass some (not enough) spares around to their buddies.
The breach kicks off and the cops rush and a firefight begins.
The Americans pare off continuing around the curved shape of the lowered mechanical wall

some upper balcony seats of the hall]
Some important-dude sitting there. Looks civilian. Another military, takes out a gun.
A seeming amount of not being concerned. My guess was they appeared to be behind glass on that balcony, maybe it was reinforced/bullet proof.

the back corridors leading to the upper balcony seats of the hall]
The Americans push up the back corridor to the upper balcony seats. Shooting some dudes on the way up. Kicking in doors once they get up there.
They get to important-dude balcony kiosk.
Military guy is taken out. No bullet fired (hazy on this).

Conversation with important-dude. He's been made (so the implication I drew: he's a spy). This is his opportunity to get out. They make the alternative clear as he hesitates. This is his opportunity to get out or die... orders from their organisation, you understand etc. He decides to get out.
They break windows of kiosk and toss down a rope and out our main American goes down the rope with important-dude

the lower main seats of the hall]
(all sleeping audience is still here, Important-dude and American have landed sitting into empty chairs)
The gunfight proceeds. Maybe explosives are being divied out. Important-dude moves but American tells him to stay down and fake sleep.
He does.. but then I get hazy..
We're in a corridor.. more hazy..
American feels there's some betrayal by local cops contact.. more haze
American back in the hall.. the explosives have timers.. something wierd is happening.
He's upset the explosives are there.. do I remember the timer acting wierd?
Someone mentioned not to worry:
"They're in the cheap seats"

Terrorists dying, cops shooting, American asked question in foreign language but doesn't speak.
American now made by cop asking the foreign questions.
Bang foreign-questions-cop dead.. by some cop-but-different-dude in a darker almost motorcycle black-all-over helment (the cops have see-through visors, this dude's visor is all black)
Black-visor-cop-gone..
American joined by another in disguise.. they formulate plan to proceed:
- don't trust local help anymore
- don't use planned exit
- don't let explosive kill everyone

Plan is go]
They toss the explosive into balcony kiosk they came out of.
The exit through breach in mechanical wall that the cops came in.
Explosives go off and cause distraction.
They get outside where there's no cops (hazy on this) hanging about. I guess they all charged.
Into the Van.. local cops be like: Where's our dude?
Scuffle.
Americans win. Van drives off.
Maybe some wierdness about time..
Can't remember much happening after that.

I can't remember seeing Aaron Taylor-Johnson yet he's top of the IMDB cast list:

the 'TENET' is going clockwise in a circle and the colour changes once per rotation