You have never been in this part of the house before. The hallway is a dead-end, but that door looks promising.
If this shows up you are quite out of luck, m'friend.
What do you do?
Investigate Wall
Investigate Painting
Investigate Door
Investigate Diagram
Investigate Floor
Investigate Room
Punch that Door Down!!
Twist the Knob
Use a Chemical
Pick the Lock
Select Chemical