In the late 1980s, a serious explosion occurred in the Chunjiang Chemical Plant. A group of living lives were lost in the flames and a group of children became orphans. A group of children who lost their parents experienced the darkest moments in their lives. They became confused, rebellious, and completely lost their direction in life. A girl named Xu Xiaoning walked into their lives, comforted their lonely souls, and illuminated their path in life. But one hot afternoon, Xu Xiaoning was taken on a red motorcycle and disappeared without a trace. Soon after, their orphanage was reduced to ashes in a fire, and two orphans disappeared in the fire.
In 1995, Cai Guohua, the director of the chemical plant who funded them, was killed and his heart was dug out. The suspect targeted laid-off worker Chen Fujun. A few years later, the police discovered that the Cai Guohua case was mistaken and the murderer was someone else. In order to find the missing Xu Xiaoning, Xia Chuan, an orphan at that time, became a policeman and returned to his hometown to start the Cai Guohua case again. At this time, a murder occurred again, and the hearts of the deceased were dug out. The case was strange and horrifying. Until one day, an autobiography appeared on the forum, and the police finally discovered the clues. As the investigation deepened, the police discovered that all the murders pointed to Xu Xiaoning, who disappeared that year.
Where did Xu Xiaoning go, and what happened to her?