Viridinia (Silvia Pinal) is preparing to start her life as a nun when she is sent, somewhat unwillingly, to visit to her aging uncle, Don Jaime (Fernando Rey). He supports her; but the two have met only once. Jaime thinks Viridinia resembles his dead wife. Virdinia has secretly despised this man all her life and finds her worst fears proven when Jaime grows determined to seduce his pure niece. Viridinia becomes undone as her uncle upends the plans she had made to join the convent.