The Eighteen Levels of Hell: Lying is Forbidden Here

Looking at the entire script.

Ling Yu's fifteen people, the first time they walked out of the Dark Zone, had already been scrambled.

These fifteen people came to the Light Zone.

Some people were already not from this timeline, but they didn't realize it.

Moreover.

Without realizing it, they walked into the villa.

Then, they could no longer confirm who was on the true timeline and who was on other timelines.

And when they realized this point...

It was late.