The Glow, a place where the radiation is so hot it can burn someone from the inside out.  The Brotherhood of Steel sent Natalia and her crew here to fetch something, and so they knock back a few anti-rad pills and descend into the pit!

Vault 13's water purification mechanism has been repaired and so Natalia's home is safe -- or it would be, if it weren't for those big green supermutants roaming around.  Natalia is given a new task: find out where the mutants are coming from.  She sets out once more into the wasteland with her companions Ian and Dogmeat, free from the restrictive time limit, and free to explore the wasteland at her leisure.  There is a lot of work out there for a mercenary, and maybe while she's indulging herself she can gleam something about the mutant menace.