Note: This mission is advisable, if you play as hero, that is, if you strive to accumulate Good Karma. Besides, it is good to know that accepting it locks access to mission 7b (Fight Intolerants), designed for the villain.
The starting point of this mission is on the roof of one of the buildings in the western part of the Pioneer Square district. After hearing a brief conversation, head to the docks located south of there. The docks are crowded with drug traffickers, so start by attacking the closest ones. It is good to use basic Neon Beam to eliminate enemies, however, while going across the main walkway you should also often perform Light Speed dash??, as enemies can be easily neutralized on contact with rushing Delsin.
The mission described involves destroying three drug stashes at the docks, and the first one is located in the eastern part of the harbor. Locate the containers and run your finger tip on the touchpad to open one of them. Once you make sure that these are drugs, reach the upper balcony of the nearby building and press the touchpad again, this time to pain a graffiti.
Two other stashes are located west of here. The main walkways lead to them - you can reach them in any order. No matter which path you choose, you have to watch out for enemy snipers in addition to standard drug traffickers. Here it is good to aid yourself with Light Speed dash, in order to significantly reduce the risk of taking a serious injury and to get there more quickly. Also all the time be careful not to fall into water, although this will not automatically result in failing the mission.
Just as before, you must locate and examine red boxes with a dolphin logo. The only difference is that before painting a graffiti, it is necessary to release the prostitutes held captive in the huts in the docks. Luckily, this is a very simple task, as in both cases it is enough to approach the marked door and use touchpad in the right way. Proceed fighting until you get rid of all enemies in sight and destroy the three drug stashes.
Head back toward the harbor exit (do not try to fly over the water, because you are bound to fail to safely make it to the main part of the district) taking under consideration the fact that you will encounter more drug traffickers. Be extra careful of the enemies gathered on the roof of the northern building, because they are using sniper rifles. Try to use Light Speed ?? power often in order to reach the roof they occupy and deal with them. Get rid of all drug traffickers. The area will soon be invaded by D.U.P. forces. You can eliminate them as well (first, you should destroy the armored vehicle), although it is not required in order to complete the mission.
Return now to the roof of the building where you started the mission in question, and after watching the "fireworks" listen to another dialogue. The next part of the mission involves following the van that belongs to the drug traffickers, and since you must not be noticed, you need to stay on the rooftops all the time (often look at the mini-map where you can see the current position of the vehicle). You should obviously aid yourself with Light Speed?? ability, whereas it is also advisable to have Photon Jump improvement installed (it does not require many shards). This power allows you to perform long jumps by pushing X button while dashing in order to make it easier to jump from one rooftop to another.
If you did not make any mistakes while following the van, it will lead you to the main hideout of drug traffickers located in an alley in the southern part of the Paramount district. Of course, you have to deal with all enemies in that place. Since initially they are not aware of Delsin's presence, it is advisable to ambush them by attacking from the air (e.g. a powerful blast in the ground) or from one of the roofs. Those enemies will not be a big challenge for you, but you should obviously avoid their collective fire.
Once you win the battle, approach the van that you have recently followed and open its rear door (run your finger across the touchpad). Doing so will result in saving the last group of prostitutes and complete the mission. Watch another, a bit longer cut-scene and get ready for the next main mission - The Test.