The world is in shambles after an outbreak that caused some to die, some to thrive, and others to mutate into flesh eating monsters... many people hide... but people have created bases, which Alex, Leah, Ryan, Daisy, Will, and Owen find one... the UnderDogs' base... a place made from a parking garage, the walls were all closed in using wood and thick metal, the basement floor has been broken, so now the opened soil is being used for plants, the base uses electricity from the power plant in the middle of town, and they use filtered river water that they used underground piping to transport. Everyone there acts strange... they all wear animal masks and tails, which really is because the mutated people don't harm animals, so by perfectly acting like them, they can stay out of harm. Everyone ranges from the ages 4-26, and everyone expresses animalistic behavior, such as vocal expression, walking on all fours, and even simple movements, have become as such. All the children born into this establishment, they grow up with these behaviors, making their skills more and more acute. The 6 of them are walking around the base, or as the other tribes say, their den... the place reeks of different smells, for them, it's rancid, but for the people living there, it's the best thing ever. The floors all have giant crates or boxes or anything stacked everywhere to serve as walls or perching ground. There are several places for medical treatment or training ground. The six of them have no idea what they're getting themselves into... these people are the most aggressive tribe or more appropriately 'pack' that is known... and they have a wopping 3205 people...