Following the mystery of the poisoned horses, Lieutenant Alicia Hermida continues to unravel the secrets of the Acuña family in La Galana. Meanwhile, Alicia and Miranda grow closer as the investigation becomes more complicated with the discovery of a body, which opens up new leads and raises suspicions within the clan.

Alicia Hermida makes progress in the investigation into the deaths of the horses at La Galana with a key interrogation of Fernando Vázquez's nephew. Meanwhile, Fernando faces a new conflict when he discovers the relationship between his daughter Camino and Héctor Acuña, the son of his greatest enemies.

The Civil Guard has begun investigating a new crime at La Galana, the estate of the Marquesses of Monteclaro, where they were already investigating the unsolved deaths of four horses. The Acuña del Monte family is worried about this latest crime on their property, while Lieutenant Alicia Hermida and her colleagues are involved in the investigation.