“FV” is a seemingly meaningless combination of letters that suddenly appears on the cell phones of all Medyanskaya Cellular Company subscribers without exception. At first, no one pays attention to it, mistaking it for a network failure or a phone glitch. But then a terrible pattern is discovered - the appearance of this inscription precedes trouble. People go crazy, becoming dangerous to themselves and others. The city of one and a half million people is engulfed in an epidemic of madness, claiming more and more lives every day... Six friends are at the center of a catastrophe caused by an indecipherable signal from space. They're not trying to save the world. They are not trying to resist FV, which has become synonymous with the word “death” for the whole city. They just want to survive with their sanity intact!