The weather was rainy and lonely in that afternoon. Far from their friends, it seemed like an ideal time to spend some sisterly time. Faced with curiosity about how love and passion work, Ruby wants to hear more of the stories Yang had to tell. But they could scarcely have foreseen that such tales would arouse an intense desire. A forbidden sentiment among sisters, in which he would be guided by fear and curiosity, making them discover that within sin, the flaming flower of desire can flourish.