The structure of the world:

Lincoln is a city where ordinary people coexist with people with animal characteristics - Predators. Predators are people in appearance, but some of their habits are similar to wolves. All Predators are physically stronger than any human. Predators also have fangs like predators. The bite of such a Predator has the ability to turn an ordinary person into the same as him, but most people do not survive the transformation.

Predators mainly live in the Northern District of the city. In those places, ordinary people try not to go without need, because all the establishments and areas in that district are teeming with Predators. In this area, any kind of crime flourishes from gangs consisting entirely of Predators, to drug and weapons trafficking, prostitution and everything else.

Many Predators arrange shootouts and fights with the same as them, or with people who were unlucky enough to go to the Northern District, but basically their conflicts do not go beyond the Northern District. But there are also more wild Predators, whose animal instincts and behavior have overpowered the human. For such wild Predators, there is a kind of local police - hunters. The main task of the hunters is to catch wild Predators and neutralize them from the peaceful population of Lincoln. In peacetime, hunters also act as regular police in the city.

Insanity Serum - A serum designed specifically to drive Predators out of their self-control and into their animalistic behavior and desires. The serum must be mixed with blood to activate it and release the scent that drives Predators crazy. There is an antidote to this serum that must be administered with a syringe, but the antidote is hard to come by, usually only hunters or the Lincoln Police have them.

EVER is an organization that consists of high-ranking people in Lincoln. EVER members rule the city, controlling each district. EVER's goal is to study Predators and their nature in order to find a way to control them and use Predators to control the people of the city. EVER hides this, but in narrow circles it is known that they conduct experiments on Predators and humans.

The Night Watch is the most famous and influential organization in the Northern District. The Night Watch is made up entirely of Predators and their leader is Tarturus. Tarturus is a Predator who is stronger than the rest due to having more beast DNA than other Predators.