Regina Steinberg, 40, considers herself a sacrificing wife and mother. Everyone else thinks she is an egocentric. Her husband loves her anyway - until there is a scandal. When Regina, the wealthy dentist, suspected that her husband, Dr. Julius Stemberger, has a relationship, she puts her friend Nora on him. While Regina is on a spa with her mother, Julius seeks Nora's closeness, and Nora does not permanently fend off his advances. Eventually Regina finds out what is going on behind her back and Nora feels that Regina is not a "fine lady" when it comes to her interests.
In a complex story of automotive intrigue, oil barons, corporate finance, and international villainy, the inventor of an environmentally friendly car powered by energy cells becomes the target of killers. After Ralph Korda has given his patented worldcar to a German automaker for testing, he is confronted by ominous men, eager to get their hands on his patent. Evil Arab petroleum lords also want to stop this threat to the gasoline market any way they can.
Street sweeper Sigi finds a box containing not only 300,000 marks, but also a photo of his unsympathetic superior in a compromising situation. Sigi thinks he's in luck, but what he doesn't realize is that an unscrupulous businesswoman wanted to use the money to bribe influential men. And of course she wants her money back. So the good-natured Sigi becomes embroiled in a series of turbulent adventures.