Suicide during the wedding ceremony: the groom pours gasoline over himself, and the bride dies in the guests’ hands right in the restaurant of a luxury hotel. But that’s not all—lately there have been more and more inexplicable deaths among newlyweds in St. Petersburg. What lies behind the new St. Petersburg epidemic, and how can the next victims be prevented? Now this case will be handled by a group of participants in a psychological experiment—those who set out to prove to themselves that they can become real detectives. St. Petersburg puts every feeling to the test; should we be surprised that a story that begins with a wedding “bitterly” takes hold of more than one couple—all those who are torn between the fear of being apart and the horror of being together…