A quinceañera pretends to fall in love with David, the singer of the popular group Men G, and chases him to Acapulco. One night, she undresses and pounces on him, while a friend of her makes a few compromising photographs. The publication of these photos in a magazine leads David to pay a large sum and one year in prison, but the rest of the group discovers that Sonia and her friend are going to defraud actor Toni Canto and decide to prepare a trap for them

Carmen leaves her husband Julio to go live with an intellectual who has made a career in the United States. While, Julio goes away to live of rent to house of an aristocrat come to less. After meeting several colorful characters, Julio decides to recover Carmen.

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.