That’s his evidence room. He’s been receiving death threats so he’s trying to figure out who’s behind…
Thanks for responding :-) I guessed as much, but still! I can't imagine saving dead rats and whatnots for that long in a secret room as 'evidence' when you can just call in the police. But this is fiction/kdrama so I'm just swallowing it as always :-)
I'm only half way through the 1st episode, so don't really have much to say about the series. But had to get this off my chest. Why would anyone have a secret room and fill it with slasher stuff sent to them?! :-)