How to turn the load-game plot script off in only one room?

Hello,
I need your help.
Is it possible to turn the load-game plotscript off in only one room?
Do I have to do this by using a plotscript?

You could make a plotscript that turns on a certain tag every time you enter that particular room, and have your load game script make sure that tag isn't on before it does whatever it's supposed to do.

Or, to skip a step, just have your plotscript check current map.

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Mega Tact v1.1
Super Penguin Chef
Wizard Blocks

Thanks for your answers!
Current map works fine.