A poor girl named A Qing was sold into the brothel Changle Fang during Tang Dynasty. Brother Gang is an inventor, he is good at inventing sex toys and he falls in love with Wu Gu Niang secretly. While A Qing sleeps with the visitors, she drank ecstasy and has sex with A Yi. Later, they fell in love. Finally, A Qing married A Yi and left the brothel, Changle Fang.