Spain, 19th century. In a small coastal village, Olalla and her family prepare to live a very special night, during which it is mandatory to comply with a single rule: no light must remain on.
While Mario is driving under the rain, he finds a woman in the middle of the road, disoriented and covered in blood, who does not remember where she has been or what happened to her. Looking for assistance, Mario stops at a quiet bar called The Den.
