Hiroshi, the brother-in-law, feels out of place after returning home from a local job transfer. On a sweltering tropical night, he is fascinated by the sweaty sleeping figure of his younger brother's wife, Ayumi. Driven by impatience and desire, the brother-in-law rapes Ayumi while the family is away. What is Ayumi's reaction to him? A man and woman have an intense, sweaty love affair on a sleepless night!!!