You're going to start inside a sauna. We are going to turn to the left, and exit the sauna. We should see two beds in front. Take the door that is open in the corner and next to the glass shelf. Take one step forward and go into the room through the open double doors that we should see in front. Walk past the staircase on the right side, and stand right in front of the elevator. Once you're here, you're done.