In Madrid, in the mid-1950s, Paco, a handsome young man from the provinces serving the last days of his military service, is in search of both a steady job and lodging. He is engaged to be married to Trini, his major's maid. Trini is not only sweet and pretty, but also has saved a sizable amount of money through years of hard work and frugal living, which will enable her and Paco to start their lives together comfortably. With a factory job lined up, Paco moves out of his barracks and looks for somewhere to live until the wedding. Trini unwittingly refers him to Luisa, a beautiful widow who periodically takes in boarders and rents him a spare bedroom.