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Encouraged by his wife, presidential candidate Luis Donaldo Colosio resist political party pressure and writes a speech that sticks to his principles.

Three suspects are arrested in Tijuana. Cmdr. Benítez becomes even more suspicious when the investigation is immediately taken out of his hands.

At Colosio's funeral, Diana Laura sees suspects at every turn. Noticing Mario Aburto's resemblance to a new murder victim, Benítez forms a theory.

A confession from her driver spurs Diana Laura to visit Gen. Garcés. Miguel Montes forms his own theory. Benítez receives a key piece of evidence.

Montes interrogates the Tucanes. A new detail is spotted in the assassination video. Salinas announces an appointment that makes Diana Laura suspicious.

In light of new evidence pointing to two shooters, Montes gathers more proof of a lone gunman. Diana Laura confronts Montes and begs him for a favor.

Another PRI politician is killed. Diana Laura encounters complications on a secret trip to Tijuana to visit Aburto's family. Benítez is sent a warning.

Montes receives a new piece of evidence that forces him to make a decision. Rubí confronts López Riestra. Diana Laura has parting words for Montes.