To get this achievement you need to find the Neuroplasticity Calibrator before saving Koller in the bookstore at the start of the game. To do this, take the metro to the upper left metro station. Come out of the station, and there should be an electronics shop in front of you. Go around to the right and jump over the gate with some boxes in front of it. There will be a manhole cover you can open on the ground, so go down into the sewers (the screenshot shows the exact location).
Approach the restricted area you can see on the map and a guard will tell you to go away. Here you have two options:
1) Jump onto the pipe above the guard and either drop down behind him or go into a vent.
2) Go round the corner to the left, avoid a camera and hack a door to get in.
Once you're in the bar-like area, clean out the guards and make your way to the room on the upper level opposite the entrance. This is Otar's office. Hack the safe on the right side of the room, and take the Neuroplasticity Calibrator.
Now save Koller, and once you choose the dialogue option where he explains what it is, you can choose to give it to him. Do that, and you'll get some special dialogue, and the achievement will unlock.
Be warned, however, that taking the calibrator before talking to Koller will lock you out of two achievements involving Otar, so if you are going for maximum efficiency I would advise you to make a save before going in and getting the calibrator, get this achievement, then reload and do it properly.