Toni le Braun is a Opera Singer hopeful who gets a letter from Budapest saying she has a job singing. Unfortunately, she soon learns that the local in which she is singing is not an opera house but a cabaret. When she refuses the advances of one of the rich patrons of the cabaret, and the wardrobe mistress helps her escape, they are both fired. What Toni does not know is that the wardrobe mistress is a baroness, whose husband was killed in the great war. Rather than loose her old life, she works all year and when she gets her husbands yearly cheque (like pension i think) she lives in Monte Carlo the way she did before the war, until her money runs out, and then she returns to Budapest. Toni is now the Baroness' ward, and two men (uncle and nephew) fall in love with her. Toni becomes engaged to the young Richard. Everything is wonderful, but as the movie says "in all the fairy tales where people live happily ever after, the men did not have relatives". At the wedding Richard's other uncle arrives, who is the benefactor of the cabaret who had tried advancing on Toni. She is ashamed for now she knows everyone will know she is not really the Baroness' daughter and breaks of the engagement and leaves. But the uncle who lives in Hungary assured Richard that Toni was a wonderful girl and that he should not let the old humbug relatives use money as an excuse to not marry her. They wed and all live happily ever after.