Duelo de pasiones (English: Duel of Passions) is a Mexican telenovela produced by Juan Osorio for Televisa.

Álvaro Montellano receives a letter addressed for his wife and written by his farmhand, José Gómez.

Álvaro suffers from a disease called celotipia, caused by a traumatic experience as a child when his father committed suicide after learning his wife had cheated on him with their farmhand.

To make matters worse, before being taken away by her father, Alina had met Emilio Valtierra, a military officer, at a party.

When he is assigned to a mission on Sierra Escondida, he meets Flor del Campo, and does not recognize her as Alina, due to her simple dress.