Román Ascanio, a Canarian day laborer turned fugitive hunter, escorts a bandit through the mountains to bring him to justice. But after a violent encounter, Román awakens prisoner in a remote cabin, guarded by Fran, a supposed Civil Guard officer, and María, the mysterious young woman in chains.
What seems like captivity soon transforms into a supernatural nightmare: marks on the skin, prayers, and symbols reveal an ancient evil that dwells in the place and feeds on those who cross its threshold.
In these lands, where no one knows what awaits them, faith, guilt, and death intertwine until all hope is extinguished.