The JTBC statement said an "incomplete synopsis" was leaked. Maybe all these sites you have apparently checked are using that.
https://www.hitc.com/en-gb/202…a-release-date-plot-cast/
This article word for word contains the synopsis you used in your first post. It is indeed written by a white man with no sources.
so a non korean wrote this, over what they've... heard, with no kind of source or link to verify that what he's saying is true or reliable, and people just ate it up hook line and sinker? god...