The city of Qingning, which has always been a peaceful and beautiful place, has recently been experiencing a spate of disappearances. The missing persons are all family members of Qiao Hua Ming, the city's famous entrepreneur and philanthropist, which attracts the attention of the city's Public Security Bureau. Lang Xing, along with his detective team was ordered to investigate. Although Lang Xing is a famous detective, but the murderer was smart enough to cover up all their tracks and leaves no clue. Seeing that the New Year's Eve is approaching and people are on tenterhooks, the Public Security Director gives an ironclad order–the case must be solved by the end of the year! Lang Xing leads the team to search for clues day and night, yet many evidence points to the one person Lang Xing does not want to suspect–his brother Lang Kong! It was not until Lang Xing witnessed Lang Kong's murder of Qiao Huaming that he learned that Lang Kong was adopted and that his real father was Qiao Huaming, who raped Lang Kong's mother thirty years ago. Lang Kong hides his identity and has been determined to take revenge all these years. In the end, in the face of kinship and justice, Lang Xing chooses justice, and he takes his brother and Qiao Huaming to court together....