Life of the Scavengers is a side quest in Stellar Blade that unlocks after returning the second Hyper Cell to the Presence Chamber. You receive the quest from Cyrus at the entrance to the Last Gulp bar in Xion, and he asks you to find his partner Tommy.
Life of the Scavengers – Complete Side Mission Walkthrough | Stellar Blade
Tommy went to a part of the Wasteland called the Forbidden Area in search of treasure, but never returned. So, your first objective in this Stellar Blade side mission is to investigate the Forbidden Area and see if you can find Tommy—or at least some clues as to what happened to him.
The Forbidden Area is located on the eastern edge of the Wasteland map. I found that the best way to get there was to start at the Central Scrap Plains Supply Camp and head straight east. You'll eventually find the remains of a road and can follow it to the broken bridge, then turn left and activate the waypoint phone. This would be a good time to fast travel to a Supply Camp and spend all the gold, SP, and resources you have left. I didn't do this, but I ultimately wished I had.
If you want a Beta Core (and I recommend getting one), enter the large dilapidated building and follow the blue "one-way" signs and yellow paint. When you reach the top of the building, you'll have to do some pretty daring dash jumps and swing from a horizontal beam to reach the corpse that holds the Beta Core. And if you follow the narrow path between the building and the chasm and then climb over some rubble, there's a flat area with a wooden crate and a chest that I don't have the access code for yet.