Doña Pura, don Benito and don Augusto are three venerable old people who usually coincide each month in the queues of the mutuality windows to collect their pension, an opportunity they take advantage of to talk about life. When they learn that the old don Felipe, an acquaintance, is very sick and is alone and without money for a decent funeral, they decide to ask for a loan to help him, but, as they do not grant it, they decide to rob the savings bank. To do this, they will plan everything thoroughly and manufacture a homemade explosive.
Four young men are cited in a kiosk during a rainy afternoon. One has to study and the other three go to the cinema, although they are not allowed to entry because their young age. The group consists of Andrés, who works as bellboy in a hotel and dreams of becoming a bullfighter; Chispa, who follows the orders of an old grumpy man; Carlos, a student; and Negro, a shy boy. All they want is to have fun; but reality forces them to confront the problems of the adult world.