You will begin in a small room. Head forward across the bridge. Pause at the blue tarp and jump right to catch a rope. Shimmy down the rope to find a treasure at the bottom. Climb back up and run across the bridge. It will collapse under you, sending you plummeting down into some sort of silo. Head over to the ladder of seed troughs to pick up a pick. Clean it with the touch screen and climb up the makeshift ladder of seed troughs to get back up to the top. Climb to the right and onto the bridge.
Follow the path to trigger a cutscene, followed by another optional stealth section. Before you run out to attack, though, look behind Chase to find a hanging sheet. Cut through the sheet with the machete to find a treasure. Then head out to battle the enemies. Sneak up behind the guards now and knock them unconscious, then climb up the stairs and take out the guard there. Grab the treasure to your left in a stump.
You will come upon another stealth section in this room. This one can be a bit tricky to pull off without alerting the guards. Either slink away to the back of the room and wait for the guards to turn their backs, or open fire with your AK-47 to make quick work of them. Watch out for the soldier with the shotgun who will attack if you open fire. After the battle, stand on top of the crate under the floodlights to find a photo spot. Take a picture of the Guerro propaganda poster high up to the left. Then run up the steps and to the left, past the two AKs propped up against the wall, to find a small alcove with a treasure in it.
Meet up with Chase to begin a cutscene. Boost Chase up on top of the building to initiate another cutscene in which Chase will run on ahead by herself in search of some rope. Waves of enemies will begin to assault your position. Grab the grenades and throw them out using the touch screen. Don’t worry about running out of grenades, as the supplies in this section are unlimited. Watch out for the one enemy up on the balcony to the left who will attempt to fire over your cover. Beating these waves will trigger another cutscene where Chase will run farther ahead. Drake will warn her to be careful, but those warnings will fall on deaf ears, apparently, as she will find herself in the clutches of one of Guerro’s thugs. Jump down and beat up the guard to end the chapter.