Go into the hallway at the back, and then through the door on the left.
In the following hallways, use the Bubble Blower to find the magical trail Mera left for you. You can decide to wander around without the trail, but you’ll just meet a lot of dead ends.
Go into the left door at the end of the hallway and use the Spark spell on the flying robot.
Go through the door on the right and deactivate the next robot.
Go through the second door on the left and deactivate the next robot.
Go left and click on the door.
Talk to Mera. You need to find something you can use as a lock pick.
Storage Room
Go all the way back out to the lobby and use the ID card on the elevator on the left.
Enter the elevator and use the screen to go to the storage rooms on the first floor.
You need to find a way to turn on the light.
Get the can of petrol from the shelves on the left, and pour the petrol into the generator on the right.
Pull the lever above the generator to switch on the light.