Hu Xiaoyu is a young man who is so simple that he is almost innocent. His biggest wish is to work as a caregiver in Qingchengshan Nursing Home, where he can rub the backs of grandparents and chat with them every day. Until that day, he accidentally saved a girl who was being hunted, but found that he could see the "good and evil values" above everyone's head - gold represents good people, and blood represents evil people.
