The whole city is rushing to the circus to see the deadly act of the famous masked artist, the mysterious Mr. X. Among the guests is a rich widow, Countess Palinskaya, for whom any man is ready to perform a feat. But only the mysterious X is able to ignite the flame of love in the heart of the inflexible Countess...
| Camera | Anatoliy Mukasey | Director of Photography |
| Directing | Svetlana Druzhinina | Director |
| Writing | Svetlana Druzhinina | Writer |
| Writing | Emmerich Kálmán | Theatre Play |
| Art | Valeri Filippov | Production Design |
| Editing | Galina Patrikeyeva | Editor |
| Sound | Vladimir Kurgansky | Sound |
| Sound | Emmerich Kálmán | Original Music Composer |
