A young woman named Xiaole is identified as the missing sister, Yan, by her family, but doubts remain due to lack of proof. Despite uncertainty, her family decides to bring her to the palace, hoping to confirm her identity with a blood test. Xiaole agrees to come but asks if her adoptive parents can join her; male outsiders are barred from the palace, so arrangements are made for her adoptive mother to accompany her and her adoptive father to stay nearby. As they prepare to leave, a warning is given to a trafficker involved with Xiaole and her grandfather, ending with a tense plea to cease human trafficking.