Portals have appeared in the centers of large cities. People expected that someone incredible would come out of them, but instead, a countdown of a couple of minutes appeared before their eyes. This is how the “System” showed itself for the first time, and after the timer expired, individual portals opened next to each person, regardless of their age and location, from which bloodthirsty creatures emerged. If people had enough determination and strength to fight back, the “System” showed itself once again, giving the opportunity to become stronger.