'Caballo viejo' tells the story of the extravagant gentleman Epifanio del Cristo Martínez, a wealthy man in his fifties, with an established routine: his business, social gatherings with his friends and his flirtation with Yadira "La Ardiente" (a beautiful widow of the town ), until his niece Nora Márquez, a beautiful young woman with whom he falls in love, arrives at his house. Contrary to expectations, Nora reciprocates. In love with the beautiful Nora is the young Valditrudis, who out of pure love will agree to be the loser in the conquest of the girl's heart. Until one day, Don Epifanio goes to Bogotá to undergo medical tests that reveal that his health is very precarious and he decides to break with his peaceful life in San Jerónimo. The bad thing is that Nora is not willing to lose her uncle and crush.