The mission will begin once Dennis drives you to your destination right from the end of Harvest the Jungle. Once you get situated, start walking up the path and towards the outpost. Before you go into the outpost, use your camera to survey the area, and if you spot any enemies, they will be marked on your screen. This makes it very easy to keep track of where they are.
There are a total of five normal enemies and one dog inside of this outpost. It is kind of challenging (and a bit time consuming) to take them all out in a stealth manner, so just go in and start gunning them down. Once all of the enemies are killed, the outpost will be free and you will need to search the main building for Liza.
You find that she is not inside, then overhear that she has escaped. Once the cutscene is over, so will the mission. Go around and loot all of the chests, then go back inside the safehouse and get the Memory Card from the table. It’s time to go onto the next mission.