If all the guests and employees of a large hotel suddenly suffered from severe diarrhea, it means that someone needs it. But to whom exactly, private detective Vladimir Malkov, an intelligent person with almost no bad habits, must find out. Except for the addiction to alcohol. Under the guise of a hotel doctor, he begins an investigation and becomes convinced that all sorts of devilry is going on here. In addition to diarrhea, the people were gripped by sexual activity and other problems of unknown origin. And mind you, on a sober head. But you can’t fool a seasoned drunk. Because he is practically never sober. Therefore, he thinks better than others. In a word, it soon becomes clear to him that the matter smells like mass hypnosis using modern technology.