Jonny Wilken is an ageing lion trainer in a circus. He is in love with his younger colleague Jutta Sarris. On her wedding day, Jutta's favorite Bengal tiger attacks her out of jealousy and kills her. Jonny, full of pain and out of revenge, enters the cage to kill the animal with his bare hands. However, the tiger bows to him without any resistance.

A taxi driver, (Piel), finds an odd contraption on the back seat that renders him invisible, but his friend steals the device to rob a bank. An inventive comedy.

On their way to a boxing competition in Buenos Aires, the criminal investigator Harry Winkler from Berlin and Conny Steven of Scotland Yard, meet in Lisbon. Both have a 90 minute break before their ship leaves for South America. They end up meeting Ilse Siebeck, a young woman and through her become part of a criminal mystery. Ilse's uncle is murdered and Harry Winkler is quickly able to determine that the man who murdered her uncle is the exact same man who murdered his father a few years earlier.

A Harry Piel adventure in the circus milieu: the famous artist Harry trains with the young Hella Stoll, whom he has been raising after the accidental death of her parents. In the interim, now grown up Hella has secretly fallen in love with Harry, but, for the moment, he only has eyes for the seductive Vera Leander. Only a serious accident, which has almost cost Harry his life, brings him back to his senses. Unhappy Hella, however, has already left the circus. Searching for her, Harry has to battle a wild elephant and bring a criminal to justice. But finally, he finds Hella and can admit to his love for her.

Rich American Dina Morris and her New York friends sail through the Indian Ocean on a yacht. When the ship suffers a machine damage near the coast, it is decided to go ashore.