In this comedy by Director Emilio Gomez Muriel, actress Nini Marshall plays a Spanish noblewoman who moved to Mexico City with her daughter, Carmina, (Sylvia Pinal), and husband Marquis Don Fabian de Castro. Although he died many years ago, this clever widow chooses not to tell her late husband's family back home. She does this so that she will continue to receive the stipend or pension that goes along with the title of Marquis. Dona Candida uses this money to keep their home in a well-to-do neighborhood and to maintain a rather comfortable lifestyle for herself and her lovely daughter. However, problems, (and comedic situations), arise after the Peralvillo-Cozumel Trucking Company builds a new terminal right outside the upper-crust family's front door. Although initially perturbed by the noise, clutter and crude behavior of the workers, Dona Candida quickly notices that the Lead Truck Driver could easily be mistaken for her deceased spouse, (while Carmina quietly takes a shine to Gilberto, his handsome, younger co-worker.) Making lemonade from lemons, this calculating widow soon concocts a plan to use this common man and his resemblance to the Marquis in order to obtain an additional inheritance from her husband's wealthy relatives in Gallecia, who have not seen the real Don Fabian in years. The class differences between Candida and the trucker, referred to as "el Bofes" (as played by Joaquim Pardave), and their attempts to deceive do not only serve to generate laughs.They also keep the widow and the would-be impostor so preoccupied that they both fail to notice the budding romance between young lovers Carmina and Gilberto.