Everything is on the way for the annual performance of the Grandella's Store Theatre Group, "Os Grandelinhas", with the play "O Pai Tirano". That's when Chico Mega discovers that his beloved Tatão is turning her attention to another guy, Artur de Castro. When he tries to regain her love a series of mistakes between his personage on the play and his real life will lead to an unbelievable and much funny confusion with a great finale in the play's performance at stage.