The Prince of Headwaiters (1927)

Pierre, the maitre d' at the swanky Ritz Hotel in Paris, discovers that he has a son from his former marriage, which was broken up by his wealthy wife's upper-class relatives. His son, now a young man unaware that Pierre is his father, is in danger of becoming the victim of blackmailer Mae Morin. Pierre sets out to save him from the notorious Mae.