Doce abuelas

Upon arriving at his home in Ribadesella after the appetizer, Mercedes finds his nephew Ricardo sitting to the piano. She immediately warns that his body is frozen. After giving notice to the barracks, an agent proves that there is no body and that the old woman's story is due to a delirium. Two days later, the pianist appears dead in a viewpoint of the coast. As there are no signs of violence, the coroner attributes death to a heart failure. With the region immersed in a thick fog, why would Ricardo take the discomfort of appearing to a viewpoint from where he could not see the tip of his shoes?