A famous racing driver must give up his sport and take over the management of the porcelain factory on incentive of the vigorous grandmother as the last shoot of an old businessman's family. Unrecognized he is regulated as a worker what a love story with a 20-year-old worker arises from, who leads after incidents in the happy end. - After Franz Lehar's operetta produced comedy

The ambassador of the Kingdom of Luvaria orders Baron Belmar, his attaché, to win the interest of Mona, wife of the war minister, who opposes a treaty the ambassador very much wants signed. However, his mission is complicated by the fact that Helene, the ambassador's wife, is extremely jealous of every woman he meets, for she was responsible for getting him his appointment as attaché. Belmar, nevertheless, is in love with Greta, who will not marry him until he is proven worthy of her trust. After many narrow escapes from exposure of the personal intrigue, he manages to sway the attentions of Mona, who persuades the war minister to sign the treaty, thus gaining Belmar an appointment as ambassador to Peru and Greta as his wife.

The taxi driver Fritz gets to know the millionaire-heiress Iris and marries her against the wishes of her family. They live together in a small apartment and are very happy. But Fritz wants to offer Iris more and thus finds a position as a laborer in a large car factory and ends up making a career for himself as a race car driver. But while he is driving from one victory to another, he is getting more and more estranged from his young wife. As his career starts to go downhill, he notices the mistakes he has made and tries to win Iris back.

Ave Maria was the second film-starring vehicle for legendary operatic tenor Beniamino Gigli. Mourning the loss of the only woman he ever loved, concert singer Tino Dossi (Gigli) is temporarily shaken from his doldrums by vivacious Montmartre entertainer Claudette (Kaethe Von Nagy). Dossi doesn't realize that Claudette is merely using him to advance her own singing career. Ultimately won over by Dossi's sincerity and courtesy, Claudette falls in love with him for real, only to suffer the pangs of conscience as a result. About to kill herself, she decides instead to return to Dossi's arms, vowing never to confess her original mercenary intentions.

Womanizer Conny and his less successful brother Fred make a lucrative real estate deal on the Côte d′Azur and receive a cheque for 100,000 francs as a down payment. On the train back to Paris, Conny meets the attractive Vera and stays in Monte Carlo for the time being because of her. But Vera and her companion Baroff, a swindler posing as a baron, are on the prowl, and Conny loses the check to Baroff in a game against the supposed baron. When he realizes that he has been tricked, he rushes after the train on which Vera and Baroff are fleeing and has a serious accident. When Vera finds out, she reproaches herself. She meets Conny's brother Fred at the station and falls in love with him. Vera then decides to spend her future with Fred and fundamentally change her life.