In a rural area, an insect receives a letter with an invitation to participate in the Insect Ball, to be held in the city and with no end date. There, flies, mosquitoes, mosquitoes and cockroaches have fun and dance, until a robot, named Detefon arrives to end the party, pouring an insecticide, exterminating all the insects. Animated advertisement for the insecticide Detefon entitled "Baile de Bugs", directed and animated by Eugenio Marcus and produced by the company Rex Filme.