Since then, the doctor of the ambulance Artem Vasilyev feels something strange. Or he went crazy himself, or almost all of his recent patients went crazy at the same time! That healthy man suddenly begins to assure doctors that he is a woman, and weeps like a hysterical institute . That gentle, sweet, charming girl, having opened a graceful mouth, expresses herself worse than any drunken loader and claims: she is ON! That is, a man! Epidemic in the city, or what?! And all the "sick" have one common sign: On the forearm of these patients, Artem finds a clear trace - whether a bite, or... an injection. I think he’ll have to deal with this whole thing.... In addition, one of the patients, a girl with a gentle name Lisa, who considers herself a man, causes in Artem’s soul exactly those feelings that a real man feels only in relation to a real woman!