Set in one-day, three people embark together on a car trip from Madrid to Almeria. Antonio (Cebrián) is a successful industrialist, however he is dismayed that his personal life does not reflect his glittering career. He is insecure about his faltering marriage to Teresa (Chaplin), whom he believes is having an affair with his best friend, Antonio (Galiardo).
July 1, 1888. The body of a woman is discovered during a house fire, but the examination reveals that she died victim of a stabbing, not the flames. Her maid and pet dog are found drugged in another room.
Madrid, Spring 1913. During a visit to the casino, a beautiful 20 year-old woman catches the eye of a 50 year-old rich widower. But the gamble he is about to commit is far greater than he suspects.