The women of Hidden Dragon Village have the blood of dragons on their bodies, and every twenty years they need to change their bodies with new scales with a wicked heart. Liu Xu met Luo Xiuyan before his birthday. He had a mole between his eyebrows that could not tell the difference between good and evil, but the bad deeds of abducting and selling women were hidden between his fingers. She followed the rope he handed her and walked into the village built by traffickers. As a bride, she waited for a belated sacrifice. On the day when the dragon mother swallowed up all the black energy of her sins, all the mothers in the village finally walked out of the mountains - it turns out that the so-called transformation is not about shedding the old skin, but about recovering the debts they had swallowed alive.