Zane and the girls traveled deep within the decrepit city, which had begun to decay as a result of conflict and a general lack of maintenance. Humanity was in its second week since an apocalypse began, and it was only a matter of time before the world's power supply began to shut off.
While this wasn't a concern for Zane, specifically because of Olivia's exceptional skill. It would definitely be a problem for humanity soon enough. Zane and the girls travelled for quite some time. Until they penetrated deeper into the city than they had ever done before.
The good thing about travelling in an up-armored Humvee was the simple fact that the Undead lower than Tier III did not pose a danger to them. Because of this, Zane and the girls had trampled over the undead hordes with their vehicle as they drove through the roads.