Roberto Negresco lives with his parents Antonio and Trinidad and works together with his father in a waiter bar. He is an extremely naive person, which, together with a strange defect that prevents him from pronouncing the "p", makes him a rather peculiar being. Julita Caporeto lives with her parents Nemesio and Charo, and is also a girl of an ingenuity without limits, to the point that, although she has been dating her boyfriend Cayetano for quite some time, she still does not know "how the children of Paris". In a guateque, Julita and Roberto fall in love with each other. The problem is that there is a big obstacle between them: Their families have been long since antagonized.