Piedra de toque (1963)

The son of don Enrique Rivera, a wealthy businessman with immense properties in Equatorial Guinea, Carlos is a young man as handsome as he is carefree. He maintains a romantic relationship with Dora, his father's beautiful secretary. However, don Enrique, unaware of his son's feelings, asks Dora to marry him. The young woman, fed up with Carlos's lack of commitment, accepts the widower's proposal. When Carlos receives the news, he decides to go to Africa trying to forget Dora and the love disappointment that has broken his heart.