Sumire, K's best friend, is madly in love with him, but her commitment to a writer's life prevents her from making any personal commitments. At least, until she meets an older woman who has an irresistible attraction to her. When Sumire vanishes on a Greek island, K is asked to join the search party—and finds himself dragged back into her world and plagued by disturbing visions. Sputnik Sweetheart is a subtle and melancholy reflection on human longing.