The Invisible Guardian (2017)

After the discovery of a teenage girl's lifeless form by the River Baztán, bearing resemblance to a previous murder, whispers of speculation quickly spread through the quaint village of Elizondo. Is a sinister ritualistic killer at play, or could it possibly be the elusive basajaun, a mystical protector of Basque folklore? Inspector Amaia Salazar spearheads the inquiry, leading her back to the core of the Basque countryside where her roots lie, a place she had hoped to leave behind forever. Veiled in mist and encircled by dense forests, this land harbors unresolved feuds and a haunting childhood secret that Amaia must confront. Amidst the village's superstitions, she must battle her inner demons to tackle the grim reality of a serial murderer on the prowl. Yet, as she delves deeper into the case, an ominous presence lurks in the shadows, intensifying the mystery at hand.