Circus performer Samson will have to save the production of the ballet "Swan Lake" on the stage of the Bolshoi Theater. The fact is that Samson's circus was tricked into falling into the hands of a moneylender named Zhadin. Samson tries to steal fictitious documents for the circus's ownership, but a chase begins for him. Escaping from her, he ends up at the theater, where he meets the personal costume designer of the prima ballerina Anastasia, Sonya. And it is at this moment that a unique tiara belonging to Catherine the Great, which Anastasia should have worn in the fourth act of the ballet, disappears from the dressing room. The performance is under threat of disruption. Sonya and Samson will have to find the jewel thief and save the play.