A murder takes place in one of the city's slums. The victim's death is bizarre, and strange symbols mark their body. Xie Bingyu takes the case and begins investigating. At the crime scene, she finds traces of high-tech tools and mysterious symbols, leaving her baffled. Then she meets Yi Qianfan, who offers to help analyze the clues. As the investigation deepens, several similar murders occur, each shrouded in mystery. Xie Bingyu and Yi Qianfan discover that the victims seem to share some hidden connection.
