A chance discovery on the shores of the Baltic Sea gives impetus to a monstrous epidemic spreading across Russia like wildfire. Petersburg becomes the first victim of the disease. The speed of infection and high lethality of the virus are forcing the authorities to close the city under strict quarantine. But this provokes an increase in violence and lawlessness. The premonition of death sometimes releases not the most noble feelings in people... The daughter of Sergei Avdeev, a former intelligence officer, was also struck by the virus. A doctor I know reports that a specialized scientific institute managed to obtain a vaccine, but it is just a prototype, not tested, not certified... A desperate father is ready to grab the most meager chance to save his daughter. But he needs to deliver the girl to the institute. This means crossing the night city, which has become a deadly obstacle course...