Teresa hopes that her social climbing ambitions will be fulfilled by her young son, Jacy. When he learns that his mother has started an affair, Jacy leaves home and embarks on a series of short-term liaisons with several women. He ends up by marrying a retarded but incredibly rich woman. His mother's hopes have finally been realised. Meanwhile, Teresa has herself found love and happiness, with a schoolteacher.

Sabino Grupe, head of accounting at a major insurance company, Elisa's husband, a beautiful fashion model who has had to leave the gateway to the most dangerous jealousy of his consort. In return, he has put Sabino sign letters and letters to exhaust their funds. Until one day he had enough and breaks with the consumer society and everyone.

Arturo, who has just turned 15, is in love with 13-year-old Paloma. In a moment of passion at a ski lodge while on a field trip to the mountains with their schoolmates, he gets her pregnant. Afraid of what may happen to them if their strict (but somewhat inattentive) parents or any of the rather straight-laced teachers at their Catholic school find out about the baby, Arturo and Paloma turn to their young friends and relatives for help instead. This proves to be something of a coming-of-age for everyone involved as they try to help the young couple get married, conceal the pregnancy from their parents, and prepare for the birth. The many adventures they have while doing this, while often amusing, help drive home to them that the old wives' tale about storks bringing babies is just a myth (hence the title), and pregnancy and childbirth are actually very serious matters.

The classic good-looking girl from village, comes to the capital willing to make the world hers. Her idea is to succeed in the advertising world as a girl-ad

Mario and Teresa are a seemingly happy marriage, but she reproaches that he does not value enough her work at home. As he is not willing to recognize the importance of domestic chores, Teresa offers him to exchange roles. While Teresa gets a job, and develops very well, Mario is unable to keep the house in order.

Matilde is a former prostitute who gets married to an american soldier with an uncertain future, due to the possibility of being recruited to the Vietnam War.

Madrid, Spain. When a religious community running an orphanage buys a car, the vivacious and intrepid Sister Tomasa accepts the task of getting behind the wheel.