It had been two months since Zane and the girls had first arrived at the bunker. During this time it would be accurate to say that their progress had been significant. Not only in terms of leveling up but also in terms of building a sustainable community.
It turned out there were pockets of survivors all over the Carson area, and though battles were waged with some of these survivors, who were, shall we say, more villainous than others? Angelica's expanded abilities allowed her to not only detect lies from people but also their true nature.
This made it easy for Zane and the girls to build up a small community of some fifty survivors based around the neighborhood where the bunker was located beneath its surface. A small wall was constructed around the area, and the undead within it were thoroughly purged.