Sports reporter Sergei accidentally and without malicious intent steals a very important code from a very important safe from the mafia. The journalist is chased. It is almost impossible to hide from the bandits. But the ex-fiancée dresses Sergei in her mother's costume and even introduces him to her new fiancé Leonid. Leonid turns out to be one of those interested in Sergei's death, but does not recognize him in powder and blush, thus acquiring a textbook mother-in-law...
