Inspector Amaia Salazar confronts the origins of her nightmares as she unfolds the darkest secrets of the Baztan valley. Part 3 in the Baztan Trilogy.

In 2013, a filming unit arrived at Isla del Faro Rojo to make a documentary about the Ticolense culture that lived there, and about how they turned it into a place of mass extermination. Once installed on the island, away from all civilization and technology, the camera was rendered unusable due to a technical problem. But that was not an isolated event, and Leon, the person in charge of the making of, recorded everything that happened afterwards with his small camera. This is his bloody legacy.