Vitesh P

The parallel world concept is actually good and I am eager to see how the use this concept to solve the case and proceed the story further personally I am very curious about how this show will end .
Will Seo Do stay in that world forever with Han SEO ?
I mean this should happen or not let's see

I don't think he is the real killer , the makers will just confuse audience till the end and then they will reveal the actual incident and serial killer as the story progresses or else maybe he is the killer just killing the bad guys like a vigilante .