1928. In the popular newspaper “Red Worker,” the deputy editor-in-chief disappears. Rumors say he ran away from his wife—but then it turns out that a huge sum is missing from the editorial cashbox. The case is handled by a novice detective, Ivan Opalin. The investigation gets complicated when a journalist from the paper is assigned to him: he has been tasked with writing a series of articles about the work of the criminal investigation department. Soon Opalin realizes that his new acquaintance is a very suspicious person…