By the middle of the 21st century, it became clear: someone must make sure that it is still possible to live on Earth. To combat the global epidemics raging on the planet, the all-powerful Sanitary Service was created. With its help, it is possible to contain the spread of the most terrible viruses and pathogens of deadly diseases. And when the world is suddenly engulfed by a mysterious pandemic of suicides—bizarre, grotesque, cruel—it is the Sanitary Service that tries to contain and extinguish the outbreak of the mysterious disease. Service functionary Mikhail Malakhov, who is leading the search for the causes of the pandemic, gets to the bottom of the truth - and this makes him an outcast, a hunted beast, who is furiously pursued by his former colleagues: the truth is too incredible and should not be made public under any circumstances...