Humanity was sick. Always. It hurt and got better. But not at this time. And the reason is not an epidemic, but a vaccine that was designed to save people from this infection. Those who did not want or were unable to get vaccinated managed to survive, a tiny fraction of the millions who populated the planet just yesterday. They survived and ended up in hell - because everyone else ceased to be people, turned into monsters, psychos, animals, driven by two instincts - to kill and devour. Denis Maksimov, a pro in security and special operations, dreamed of retiring and settling in Spain. But instead, he took up arms again, becoming a witness and participant in the terrible Catastrophe. A witness - because I managed to escape in the first days and see the collapse of the world, a participant - because now I have to live on, or rather, survive, look for people who remained normal and save my loved ones.