Glass vials are used to break at the most inopportune moment. In the laboratory where studies of an unidentified virus were conducted, irreparable happened-the bulb broke with the research material. The puddle quickly spread over the tiled floor, and the vapors penetrated the ventilation grilles. The safety system and the underground bunker, similar to a labyrinth, fenced off from the outside world with hermetically sealed doors. Scientists, laboratory assistants, assistants, almost all the personnel turned into living dead. Lucky only a single guard, although it's hard to call luck being a zombie in the society, cut off from normal people. We will have to fight for survival.