Room 2: Knock Knock Who's There

With a group friends, you stumbled upon an isolated cabin that located right in the middle of a thick,green forest. You enter to see a cozy interior. It looks well-lived in but something just doesn't feel right- there's a chill down your spine as you suddenly hear muted knocking sound of hard wood. Sounds as if someone is at the door but there isn't anyone. A stench that smells like corpses reached your nostrils and your gaze forced onto a photo frame by the table. The knocking sounds get louder now. Maybe it isn't the door. Maybe it's the wooden cane belonging to the resident but here you wonder- where is everyone?