This comes after returning from a mysterious oil field.
Here’s how to solve the puzzle.
There is a note in here stating that the key can be found in the Grand Parlor.
If you want to skip the search for medicine bottles, just scroll down to the lock solution below.
Circle around to the staircase on the north side and head down to the Grand Parlor.
On the piano in the center of the room is the key to the Medicine Box.
Take the key and head to Lottie’s Room to get the second medicine bottle.
Put that combination in, as shown below.
With the key in hand head down to the Cellar and enter the locked area.
The Valve is located at the back of this area, but an electric wire blocks the path.
Now head back to the Boiler Room,be warned there is an enemy in the basement hallway now.
Turn off the boiler and head into the back room, where the second plate piece is located.
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