Miguel seduces his stepdaughter Cita. While her mother, his wife, is none the wiser the younger daughter Celia spies on their heated couplings with guilty excitement. Inevitably his attentions turn to this curious virgin. Although at first she resists his affection, it's only a matter of time before she relents and get impregnated. Mario, Celia's boyfriend, agrees to marry Celia, thinking that he is the one who got her pregnant. Mario and Celia, now married, go to the big city to try their luck. Edgar, Mario's friend in the city, lets them stay in one of the spare bedrooms in his house so that they won't have to pay rent.
