Far below, a dog barks once — sharp, surprised — then silence. The tide draws itself inward, breathing out a hush of shells and pebbles. The cloak about her shoulders flutters as a gust passes, carrying with it a scrap of paper at the tower’s foot: a weathered postcard, edges softened, ink partly washed away. She picks it up; the handwriting is a lover’s loop, a promise written decades before and never quite fulfilled.