so this is the oddinary trailer but in my theory. So all the group members are dead except Felix. And the others work for Hyunjin. Bangchan, the first stop, will accept the person to come and alerts the other members. Han will lure you deeper into the building by acting a bit strange. Seungmin takes photos and gives them a cake. I.N was the lastest member/victim and has been missing for awhile. Leeknow will scare them slightly giving them a warning. Changbin tries to save them but never succeeds. And Hyunjin finishes the job and makes you one of them