Trotín Troteras is the disinterested witness of the absurd situations lived first by a lecturer and then by a soldier with an umbrella, which opens when it stops raining and closes when it rains…

Guillermo, who is twelve years old, is in love with Margarita, a girl who is a year older than him and who prefers to date more mature boys. Valentín and Josefa, who are in their seventies, dream of escaping together from the retirement home where they live so they can get married.

Cayetana, her boyfriend Paco and Venancio, her foster brother, commit small thefts and, from time to time, spend a few days in jail. Until they meet with Federico, a thief who has traveled abroad and convince them that using European methods success is guaranteed. Paco then decides to act scientifically and seizes a hospital surgical equipment. When they want to realize, poor Venancio is forced to give an injection to a dentistry patient and, even worse, Paco has to pull out a tooth. And all that, before entering the operating room