An amateur entomologist is left in Tokyo to study an unclassified species of beetle found in a vast desert. When he misses his bus back to civilization, he is persuaded to spend the night with a young widow in her hut at the bottom of a sand dune. What results is one of cinema's most unnerving and palpably erotic battles of the sexes, as well as a nightmarish depiction of the Sisyphean struggle of everyday life.