This time, Captain Vašátko of the criminal police and Horác, a painter, bohemian, and amateur detective, will be searching for the murderer of the author of so-called computer poems. Kristián Vích is a mathematician approaching forty. He is very popular among his colleagues. He is secretly dating Tereza, the wife of his rude colleague. The lovers are planning Tereza's divorce and a life together. However, Vích's despotic mother has other plans for her son and a favorite among her colleagues. One day, Kristián's body is found floating in the river, and the perpetrator is, of course, unknown...