Blameless

Playing in a role of a young architect, you are asked by an unknown man to help with some design decisions in the interior of his unfinished house. Accepting the legitimate request, you are taken to the house the same evening. Wandering about the interior, you notice a slight detail with your trained eye and turn to the man to tell him about blood stains spilled on the floor. That's when you get hit in the head, falling to the floor, passed out. When you wake, the man’s gone. Your phone is smashed and the only door out is locked. You are no hero, but there's no other choice than to investigate the strange whatabouts yourself. Looking around, your architect instinct tells you that you don’t really need to open the door in order to pass through…