Anselmo is a 10-year-old boy, attending the last year of primary school. This is the age in which the fateful question "What do you want to be when you grow up?" suddenly acquires a frightening concreteness.The boy panics, while all the professions of the world flow through his head. Each episode consists of an imaginary adventure of Anselmo confronting himself with a different profession: an inexhaustible source of challenges that generate comic misadventures.