This is yet another Balance of Power mission, with the other one being locked out should you choose Amita over Sabal. She wants you to capture the Rochan Brick Factory for processing the opium. Head to the first objective to find a place you can stock up on some ammo and other guns if needed, then go and meet up with the rebel leader up the hill.
It might be difficult to use stealth in this mission, as the place is pretty big and there is an enemy truck that patrols the perimeter. Your goal at the moment is to shut off three generators, which filter the air inside to make it breathable. Once you do that, you’ll be able to open the door and head inside. Remember to not destroy the generators, but go up to them and interact with them.
You may notice the elephants nearby that are being held captive. If you have the riding skill, doing that will be a big help in clearing out the enemies; otherwise, it’s a good idea to leave them alone. Taking too long to find the generators will make it so Amita will mark them on your map. Shutting down all three will open the door for you to go inside.
Once inside, you’ll notice something weird when you go through the first door. As you kill the enemies that appear, they will dissipate in a cloud of colored smoke, indicating that Ajay is hallucinating. Either way, continue through until you find the chemist, killing him only to have him appear again. Keep shooting him until you can continue, then make your way to the exit, where the mission will end.