Tenet · written by Christopher Nolan · 2020

SWAT teams flood the lobby as the Protagonist watches gas canisters piped into the ventilation system.

Scene 2 of 275 · ≈ 1 min on screen · Act one

Act oneAct twoAct three

Begins 1 min into a 2:28 film

The story so farBefore scene 2

An unnamed intelligence operative, recruited into a shadow war fought through time-inverted weapons and objects, teams with an enigmatic ally to stop a dying Russian oligarch from using technology gifted by a dying future to erase the present.

Just before
Scene 1
American operatives infiltrate a staged terrorist siege at the Kiev opera house under cover of a SWAT response, the Protagonist among them.
Scene 2
This scene

2INT. LOBBY, CONCERT HALL – CONTINUOUS

SWATs mass at each entrance... the Protagonist watches GAS CANISTERS brought in TO THE AIR-CONDITIONING SYSTEM. The SWATs pull on GAS MASKS...