Marinelli, however, struggles with financial difficulties and Jan and Annie are soon fired, ending up at the same theatre as Truus.
While Jan and Annie get ready for their first performance, one of the detectives decides to visit their dressing room and present his crush with a bouquet of flowers.
Assured that they have caught the jewel thieves, the armed detectives turn up in the prompter's booth while Jan, dressed as Marlene Dietrich, performs the song 'Ich binvon Kopf bis Fueneingestellen'.
Eventually the company accidentally ends up in the room where at that very moment Marinelli's brother, Mr. Jansen, is being questioned by the police in the presence of the real Jolly Sisters.
Jansen confesses to the crime and Annie and Jan return the jewels, receiving a hefty reward.